Math Blog 817 (2008)

Tanner`s Percent Post

2009-06-02T07:44:00.004-05:00

Mr. Harbeck asked us to make a post with questions off of a sheet we did in class. We had to do five questions, three from part A and any two from part B.

Part A

1. 245% of 356.8

356
___= 3.568
100
3.568x 245=874.16

2. 68.75% of 730
730
___=7.3
100

7.3
___=1.825
4
1.825x3=5.475
7.3x68=496.4
496.4+5.475=501.875

3. 360% of 129.95
129.95
_____=1.2995
100
1.2995x360=467.82

Part B

1.Table Salt is a chemical compound of sodium and chlorine. recommended daily intake is about 1700 mg. If Canadians consume 182% of this amount on average, how much sodium is one person eating daily?

182% of 1700
1700
____=17
100
17x182=3094

One Canadian consumes 3094 mg. of sodium daily.

2.The 4900 seat hockey arenas was 63% full. How many people were at the game

4900
____=49
100
49x63=3087

3087 people were at the game

Jowella's Percent Post

2009-06-01T21:47:00.008-05:00

For this post, I chose to answer 5 questions from the paper that Mr.Harbeck gave to us during math class. Here are the five questions that I chose to answer.

4.(c) 245% of $356.80?

(d) 68 3/4% of 730?

(e)60% of $129.95?

6. Table salt is a chemical compound of sodium and chlorine. Recommended daily intake is about 1 700mg. If Canadians consume 182% of this amount on average, how much sodium is one person eating daily?

8. The Nile River is about 209% the length of the Yukon River. If the Yukon River is 3 168 km. How long is the Nile River(to the nearest km)? show your work.

The Nile River is 6 621.12 km long.

Nicky's Percent Post

2009-06-01T19:39:00.010-05:00

Part A

Part B

Linda's Percent Post

2009-05-31T21:59:00.017-05:00

Hello everyone! Mr. H assigned us all a post answering a few percent questions, and here is mine. Feel free to leave a comment!

The first question asks what is 245% of $356.80. To solve this particular question the easiest way to do so is to use a ratio chart, as shown in the image above. As mentioned previously, the question asks what is 245% of $356.80, meaning $356.80 is the whole, or 100%. That is the first thing you put is what 100% is, or the whole. Our goal is to find what 245% of $356.80 is, so the easiest way to attack this kind of question is to find what 1% is. So how do we get from 100% to 1%? We divide by 100! Remember, whatever we do to one side we must to do the other (of the ratio chart). 100% divided by 100 is 1, and 356.80 divided by 100 is 3.5680. Now that we know what 1% of $356.80 is we can easily find out what 245% is quickly, simply by multiplying 1 by 245. Quite obviously, 1 multiplied by 245 is 245, and 3.5680 multiplied by 245 is 874.16. Our answer is $874.16.

The question asks what 68 3/4 of 730 is. We're using a ratio chart to solve this question. We begin with what 100% is, and divide that by 100 on both sides to find what 1% is, which in this case, is 7.3. From there we multiply 1 by 68.75 because that is the percent of we are looking for. Our answer is 501.875.

The question asks what 360% of 129.95. We begin our ratio charts with what 100% is, which would be 129.95. To easily find what 360% is since we know what 100% is, we divide 100% by 1, (which finds us 1%) and multiply by 360, which would obviously give us 360%. Since we divided and multiplied said numbers on the Percents side, we must do so on the Value's side. 129.95 divided by 100 is 1.2995, and 1.2995 multiplied by 360 is 467.82. Our answer is $467.82.

The question asks for the commission of a house if the house is sold for $345 000. To do that we find what 6.75% of 345 000 is. We begin our ratio chart with what 100% is, which in this case is $345 000. We divide 100% on both sides by 100 to find 1 percent, which is 3450, and multiply that by 6.75, which is 23287.5%. Our answer is $23287.50. We do this because commission is what the salesmen gets off of what he/she sells. He/She gets a certain percentage (in this case 6.75) of the sales price (in this case $345 000) so that's why we solved for 6.75% of 345 000.

The question asks how much sodium is one person eating daily if people are eating 182% of 1700 mg of it. As always be begin by writing out what 100% is, which would be in this case 1700. We divide that by 100 on both sides to find 1%, which would be 17. Then we multiply that by 182 on each side to solve for our answer. Our answer is 3094 mg. We do this because 1700 mg is what is recommended about, and what people are usually taking in is 182% of this. Our goal was to find 182% of that because that's what people were taking in.

Percent Post

2009-05-31T17:30:00.017-05:00

Part A

1) 245% of $356.80

The easiest way to solve this question is to use a ratio table. The question is what is 245% of $365.80? $365.80 is the whole or 100% and 245% what you are trying to find in the whole. Here is a picture of what it looks like to solve it with a ratio table.

The answer is $874.16.

2) 68 3/4% of 730

For this question you could also use the ratio table.

3) 360% of $129.95

I'm going to use a ratio table to solve this question.

Part B

Miguel bought a car for $4700. He made a down payment of 191/2%. How much was the down payment?

I think the easiest way to solve this question is to use a ratio table to help you solve it.

For this question you have to find 19 1/2% of $4700. To find that, the easiest is to find the value of 1%. To do that you have to divide it by 100; the answer would be 47. The next thing you do is multiply 19.50(same as 19 1/2) by 47. The answer you get is 916.50.

About 5.6% of Canadians have Type 2 Diabetes. If Canada's population is 32 million, about how many Canadians have this condition.

For this question you have to find out the amount of Canadians have Type 2 Diabetes. To do that you have to find 5.6% of 32 million. First you have to divide 100 by 100 which gives you 1 and then multiply 1 with 5.6. You also do that to 32 million, you divide it with 100. It gives you 32000 and then you multiply it with 5.6. The result is 179 000 and that is the answer.

2009-05-31T16:29:00.013-05:00

Part A --
1) 245% of $356.80
356.80 / 10 = 35.68 (10%)
35.68 / 2 = 17.84

245% of $356.80 is $874.16
_____________________________________________

2) 68 3/4% of 730
730 / 100 = 7.3 (1%)
7.3 / 4 = 1.825 (1/4%)
1.825 x 3 = 5.475 (3/4%)

7.3 x 68 = 496.4 (68%)
496.4 + 5.475 = 501.875 (68 3/4%)

68 3/4% of 730 is 501.86 (rounded up to nearest hundredth)
__________________________________________________

3) 360% of $129.95
129.95 / 10 = 12.995 (10%)
12.995 x 36 = 467.82 (360%)

360% of $129.95 is $467.82
____________________________________________

Part B --

5) The 4900 seat hockey arenas was 63% full. How many people were at the game?

4900 / 10 = 490 (10%)
490 / 10 = 49 (1%)

2940 + 147 = 3087 (63%)

3087 people were at the hockey game.
_______________________________________________

3) Miguel bought a car for $4700. He made a down payment of 19 1/2%. How much was the down payment?
4700 / 100 = 47 (10%)
47 / 2 = 23.5 (1/2%)

893 + 23.5 = $916.50

Miguel's down payment was $916.50
______________________________________________

1) The commission for the sale of a house was 6 3/4%. If the house sold for $345 000, how much was the commission. Show your thinking.

My Thinking :
345,000 =100%; I have to find commission (6 3/4%)
345,000 / 100 = 3450 (1%)
3450 / 4 = 862.5 (1/4%)
862.5 x 3 = 2587.5 (3/4%)

20,700 + 2587.50 = 23,287.50

The commission was $23,287.50
________________________________________________

Percent Post

2009-05-30T20:11:00.016-05:00

Part A
1) 245% of $356.80

245% of $356.80 is $874.16

2) 68 3/4% of 730

3 *divided by* 4 = 0.75
68 3/4% = 68.75%

68 3/4% of 730 is 501.875

3) 360% of $129.95

360% of $129.95 is $467.82

Part B
1) The commission for the sale of a house was 6 3/4%. If the house sold for $345 000, how much was the commission. Show your thinking.

3 *divided by* 4 = 0.75
6 3/4% = 6.75%

The commission was $23 287.50.

5) The 4900 seat hockey arenas was 63% full. How many people were at the game?

There were 3087 people at the game.

Hi everyone!

2009-05-26T22:48:00.002-05:00

My name is Janelle, and I am also an Education student from the University of Regina. I am going into my third year in the Education program, and I am specializing in Pre-K to Grade Three right now. However, I'm not absolutely sure what grades I want to teach and I haven't had much to do with older grades, so I am very excited to check out what you guys are doing!

UofR Regina, Sk.

2009-05-24T22:12:00.000-05:00

Hi everyone,
I am Tiffany, a fourth year university student at the University of Regina. I am studying to be a Math and Science teacher, so when I finish up at university in two years I will be looking for my own classroom to teach Math in. I am excited to check out your blogs and read about what you are learning and also to see how math makes it onto the internet with your help. To be honest, I have never heard of a math blog before, because when I was in Grade 8 there wasn't such a thing. But I think it is a great idea! Well, I think this tells a little bit about me and where I am at in my education. Looking forward to seeing your work! Cheers.

Richard's 2 minutes to make a difference

2009-05-24T21:39:00.002-05:00

Our video presentation on Winnipeg Poverty. By : Richard Maquimot, Leomar Serapio,Robert Cruz, Francis Aguila. Please make a difference by donating. Hope you enjoy.

KKEA's Two Minutes to make a Difference

2009-05-21T18:56:00.002-05:00

This is my 2 Minutes to make a Difference project. It talks about
poverty in The Philippines. Enjoy :)

2 Minutes To Make A Difference

2009-05-20T22:28:00.004-05:00

The plight of the rainforest

The rainforests are disappearing. the rainy paradise were they have stood for thousands of years is steadily being chopped down, with the ground being raised to provide a living for men with no other choice. The governments who do it trapped in a downwards spiral of destruction.

Credits to Josh Fidelak and Tanner Goodwin, the makers of this film, and the countless number of sites and poeple who provided information, pictures and music (about 10)

2009-05-20T19:35:00.002-05:00

This is a video that I made with Mark's help.

2 Minutes To Make a Difference Global Warming

This video is about global warming and how it is affecting the earth, and the animals that are still around today. It also includes how it affects us here in Winnipeg. Enjoy!

Bibliography

Pictures

Burining trees -http://www.spusa.org/mindfull/wp-content/uploads/2006/11/800px-deerfire.jpg

First polar bear picture -http://animalkingdom.files.wordpress.com/2006/12/polar-bear1.jpg
Second polar bear picture -http://img.metro.co.uk/i/pix/2007/02/polarbears_450x300.jpg

Arctic Ocean -http://www.lanl.gov/news/1663/images/polar/1lg.jpg

Stop sign -http://firefighterclosecalls.com/images/600px-Stop_sign.gif

Red River -http://gsc.nrcan.gc.ca/floods/redriver/images/view1.jpg

Alpine glaciers -http://www.calstatela.edu/dept/geology/Glaciers/Jungfrau(2).jpg

Bike -http://uwadmnweb.uwyo.edu/oap/images/atlas%20bike.gif

Car -http://www.chevroncarsblog.com/images/photos/yellow-car_lg.jpg

Recycling bin -http://www.glynncounty.org/images/pages/N707/recycling%20bin.jpg

Packaged products -http://www.glynncounty.org/images/pages/N707/recycling%20bin.jpg

Music

"Be Ok" by Ingrid Michealson-I got this song off Lime Wire.

"

2 Minutes To Make A Difference

2009-05-20T18:39:00.005-05:00

In this video we will watch an educational video on the stuff about 1 million acts of green. It will give you some ideas on what to do and not to do. Please do the good side not the dark side

Credits to The following student who made this possible.. Room 73 Aaron Justin and a big hand to Darren. Especially Darren to make this vid possible

Watch it in high definition people( HD)

Vietboyz's 2 Minutes to Make a Difference

2009-05-20T17:23:00.006-05:00

2 Minutes to Make a Difference

In our video, we show how be obese can have its downfalls. We show how you can prevent obesity and live a healthy, strong, and happy life. We also show which ways of preventing obesity is good and bad. And finally we explain how you can help people or help yourself win the battle over obesity.

The Ninja's 2 Minutes To Make A Difference

2009-05-20T17:00:00.003-05:00

Our video is about saving energy and what wasting energy does to our planet. Linda, Nikki, Camille and I's video is set as a court show that suddenly gets interrupted by a news cast.

Websites:
http://wikipedia.org/
http://www.re-energy.ca/t-i_renewablebasics.shtml
http://www.eia.doe.gov/kids/energyfacts/sources/renewable/geothermal.html

2 Minutes to Make a Difference Mark and Jai

2009-05-20T16:43:00.005-05:00

In this video it will show you what global warming is, and what damages it is doing to the earth. You will learn about what can cause it and what effects it has. Enjoy!

Josh, Jp, Patrick and Nicko 2minutes make a difference

2009-05-20T08:37:00.005-05:00

Blood Diamonds
In the video we will be talking about, whats the story behind the diamonds
we're wearing. And we will also be talking about some people are able to smuggle them into different country's just to sell them.

Ninja's for the wind!

2009-05-20T08:10:00.003-05:00

This video is brought to you by a Ninja's production:)

My video:

This video explains the effects and the solutions to the problems we face from wasting energy!
We explain that even through people might not see how it effects the earth that they NEED to realize it is harming, not only the earth, but us humans on the earth, and also poor innocent animals. And at the end of all of this we really wanted to have a question that would leave the audience thinking! So have you thought about the question? Maybe you forgot it? well here it is one more time: One person can make a difference... the question is......... WILL YOU?

VietBoyz' 2 Minutes to Make a Difference

2009-05-19T22:53:00.004-05:00

2 Minutes to Make a Difference

Our video explained how obesity is problem in our world, and we try to convince the viewers to give support for these people in either big or small ways. We've also explain the good and bad ways to eating healthy. We have also explained what can happen if the obese are unable to help themselves, and what can happen if there is nobody to help.

The Ninja's 2 Minutes To Make A Difference

2009-05-19T21:49:00.004-05:00

In our video we decided to create a court/news cast theme. The video begins off in a court show with Human Race and Mother Nature, arguing over what the Human Race has done to Mother Nature's planet then the show is interrupted by breaking news about saving energy.
Below is The Ninja's 2 Minute To Make A Difference video.

References
http://en.wikipedia.org/wiki/Efficient_energy_use
http://www.saskenergy.com/saving_energy/tips.asp
http://www.saskenergy.com/saving_energy/tips.asp
http://en.wikipedia.org/wiki/Renewable_energy
http://en.wikipedia.org/wiki/Fossil_fuel

J.E.E.U.'s 2 Minutes To Make a Difference

2009-05-19T21:07:00.004-05:00

This is our video about poverty, what it is, how it affects people and how to stop it and making a difference in the world. Our video gives information about poverty and a little bit more about making a difference in the world as an individual or as a group. I hope you enjoy it!

Vietboyz 2 Minutes to Make a Difference

2009-05-18T20:31:00.007-05:00

This is a 2 minutes to make a difference and it took a long time to make it. Also we just started the video about a week before the deadline. The video is about Childhood-Obesity. It explains how you can stop it and how much of the population in our world is obese. Also it tells you whats the cause of being obese.

Rinorm Austin's Fraction Post

2009-05-12T17:20:00.003-05:00

Adding Fractions

When you add fractions you need to find the lowest common denominator. The easiest way to do that is to multiply the two denominators.

2/3 + 1/8= 16/24 + 3/24= 19/24

1/4 + 3/5= 5/20 + 12/20= 17/24

1 3/4 + 2 1/5= 3

You add the 2 whole numbers first.

3/4 + 1/5= 15/20 + 4/20= 19/20

After you add the two fractions you get the answer.

3 9/20

Subtracting Fractions

When you subtract fractions you need to find the lowest common denominator. The easiest way to do that is to multiply the two denominators.

13/15 - 4/5= 13/15 - 12/15= 1/15

4/5 - 1/2= 8/10 - 5/10= 3/10

2 2/3 - 1 1/3=1

You subtract the 2 whole numbers first.

2/3 - 1/3= 1/3

After you subtract the two fractions you get the answer.

Multiplying Fractions

When you multiply fractions, you multiply both the denominators and numerators. If theres a mixed fraction, you turn it into a improper fraction and work from there.

3/4 x 1/2 x 6/7= 18/56= 9/28

As you can see I have simplified the answer to the lowest terms possible.

6/7 x 2/3= 12/21= 4/7

4 1/2 x 1/3= 9/2 x 1/3= 9/6= 1 3/6= 1 1/2

Dividing Fractions

When you divide fractions you use a recipical.

I dont know how to do it on this mac because i dont have paint so look at the other students work :)

Erika's last fraction post

2009-05-12T00:06:00.004-05:00

Joysie's Last Fraction Post

2009-05-11T22:28:00.002-05:00

Sharmayne's Last Post

2009-05-11T22:12:00.019-05:00

Adding and Subtracting Fractions

To add fractions, you have to find the common the denominator. After finding out the common denominator, you have to figure out the numerator; you either cross multiply (the easiest way) or, find out how many times the first denominator goes into the common denominator, then multiply that number by the first fraction.

Example: 5/7 + 1/2

My next example is 5/9 + 1/3.

Now I'm going to give an example of subtracting fractions.

This question contains mixed numbers. All you have to do is change that mixed number into an improper fraction. To change it into improper, multiply the whole number by the denominator and add the numerator.

Multiplying Fractions

To multiply fractions, you simply have to multiply the numerators together and the denominators together.

My second example for multiplying is 4 2/5 x 1/2.

This question also contains a mixed number. Just like the subtracting question, you have to convert it into a improper fraction. Then, to get the answer you have to see how many times does 10 goes into 22.

Dividing Fractions

To divide fractions, you have to see how many times groups of that number goes into the other number (How many groups of __ goes into __?) An example is 3/4 / 1/3.

For this question, I decided to use a ratio table along with the fraction's reciprocal. The reciprocal is when you switch the fraction around and get a product of 1.

Word Problem

To get the answer, divide how many scoops of flour we have by how many scoops it takes to make one cake (use the improper fraction). Then multiply both fraction by how many scoop it takes to make one cake's reciprocal.

It was sunny in Winnipeg for 3 hours and 30 minutes.

To get the answer, multiply how many hours of daylight by the fraction of how long it was sunny.

Giselle's Last Fraction Post

2009-05-11T21:02:00.008-05:00

Word Problems:
10 1/2 x 1/3 =
- change the mixed fraction into an improper fraction
21/2 x 1/3=
- multiply
21/2 x 1/3 = 21/6
- simplify
21/6 = 3 3/6 = 3 1/2

It was sunny for 3 hours and 30 minutes of the day.

Robin's Last Fraction Post

2009-05-11T19:27:00.008-05:00

We Learned 4 diffferent ways to nathematical use fractions, adding ,subtracting, multiplying, and dividing.

Adding

Adding fractions is really simple. First you have to find the lowest common denominator (the lowest number that both denominators go into), then add both numerators using the lowest common denominator. If it is a mixed fraction, you convert it to a improper fraction. To convert it, you multiply the denominator with the whole number, then add the numerator. You then place that number over the numerator; the improper fraction should have a numerator that is larger than the denominator, hence the name improper fraction. Alternatively, you can add the whole numbers, and simply add the fractions, then you put both of them together. This way is recommended when adding, it is a lot simpler.

Subtracting

Subtracting fractions is almost just as simple. Instead of adding, you subtract. You find the lowest common denominator and subtract the numerators, and often, you simplify at the end. If it is a mixed fraction, subtract the whole numbers, and fractions, if possible. If it isn't possible to subtract the fractions, subtract one, from the first mixed number, then add the numerator and denominator, and use the sum of that to replace the first numerator in the fraction; now it is a improper fraction. Finally, subtract normally.

Dividing

Probably the most confusing of all, is division. There are two ways to divide, using a ratio table, or using the reciprocal, the ratio table is easier in my opinion. To use the ratio table, we place the fraction that is being divided on the left side of the table, and the divisor fraction on the right side of the table. Here, we focus mostly on the divisor fraction. Using division and multiplication, make that divisor fraction into a whole. What you do to the divisor fraction, you must do to the fraction that is being divided. Your answer will be the results of the fraction being divided. To use the reciprocal, all you do is turn the second fraction upside down, and multiply.

Multiplication

Multiplying fractions is a bit easier. You simply multiply the numerators and denominators, then simplify. To multiply mixed numbers, convert them to improper fractions, then multiply, then convert them back to mixed numbers.

Fraction Post

2009-05-11T18:16:00.011-05:00

Mhmn, this is are last blog post. Awe, I feel like grade 8 has ended. ): But anywho, we have to make a blogpost on Fractions. Here it goes :) .

Do you know what a Fraction is?
It is numbers split into parts with a numerator and a denominator. The numerator is the number on top and shows how many parts you have. The denominator is the number at the bottom and it shows how many equal parts there are in a whole. Here is an example 1/2.

Adding and Subracting Fractions
How to Add:
To add fractions you have to find the lowest common denominator. Then multiply the numerators with the denominator across from it. Next you add the numerators and leave the denominator as the lowest common number.

How to Subtract:
To subtract fractions you have to find the lowest common denominator and subtract the numerators, and if possible, you simplify at the end.

^^ THE ADDING SIGNS OR SUPPOSE TO BE SUBRACTING SIGNS :)

Multiplying Fractions
How to Multiply:
You simply multiply the numerators together. Then multiply the denominators together. If possible you simply it.

Dividing Fractions
How to Divide:
There are alot of ways to multiply fractions. You can use pictures to solve a question. You could also use a Ratio Table.

Karessa's Last Fraction Post

2009-05-11T18:13:00.020-05:00

Adding and Subtracting Fractions

Adding fractions can be confusing if you don't understand it. But, it can actually be quite simple if you do understand it. An example of adding fractions is 5/7 + 1/2:

To add fractions, you find the common denominator. Then, to find out the numerator, you cross multriply (it's the easiest way)

Another example of adding fractions is 5/9 + 1/3.

One last example on adding fractions is 10 1/2 + 6 4/5.

For subtracting, I'll use 3 3/8 - 2 3/4 as an example.

Subtracting fractions is basically the same as adding them; the rules still apply. But when you have a mixed number, you change it into an improper and subtract from there.

* To convert a mixed number into improper, multiply the whole number by the denominator and add the numerator.

Multiplying Fractions

Multiplying fractions is pretty straight forward; just multiply the numerators together and the denominators together. Simplify if possible. An Example is 4/5 x 1/2.

The next example contains a mixed number. All you have to do is convert the mixed number into an improper fraction, multiply, and then convert it back into a mixed number as your answer.

Dividing Fractions

Ask yourself the question "How many groups of __ are in __?" when dividing fractions. I'll explain how to divide fractions by using a ration table.

Example: 3/4 / 1/3.

Word Problems

Fifteen scoops of flour makes 6 2/3 cakes.

This question is pretty self-explanatory; all you have to do is multiply how many hours of daylight by the period of how long it was sunny.

Kevin's Last Fraction Post

2009-05-10T21:25:00.010-05:00

Adding fractions is really simple. First you have to find the lowest common denominator (the lowest number that both denominators go into, often you can find the lowest common denominator by multiplying both denominators), then multiply the numerators, by how much you've multiplied the denominator. If it is a mixed fraction, you add the whole numbers first, then add the fractions. If the fractions are improper, change it to a mixed number and add the extra whole to the answer.

Subtracting fractions is almost just as simple. Instead of adding, you subtract. You find the lowest common denominator and then you multiply the numerators by the same amount of times you multiplied the denominators, then subtract the numerators, and often, you simplify at the end. If it is a mixed fraction, subtract the whole numbers, and fractions, if possible. If it isn't possible to subtract the fractions, subtract one, from the first mixed number, then add the numerator and denominator, and use the sum of that to replace the first numerator in the fraction; now it is a improper fraction. Finally, subtract normally.

Multiplying fractions is a bit easier. You simply multiply the numerators and denominators, then simplify. To multiply mixed numbers, convert them to improper fractions, then multiply, then convert them back to mixed numbers.

Probably the most confusing of all, is division. There are two ways to divide, using a ratio table, or using the reciprocal. To use the ratio table, we place the fraction that is being divided on the left side of the table, and the divisor fraction on the right side of the table. Here, we focus mostly on the divisor fraction. Using division and multiplication, make that divisor fraction into a whole. What you do to the divisor fraction, you must do to the fraction that is being divided. Your answer will be the results of the fraction being divided.
To use the reciprocal, it is a lot, lot easier. All you do is turn the second fraction upside down, and multiply.

Karen's Last Fractions Post

2009-05-10T19:11:00.007-05:00

HI! Mr. Harbeck told us to do a review post about adding, subtraction, multiplying and dividing proper, improper and mixed fractions.

Skills Assignment 4: Reciprocal

2009-05-09T14:57:00.009-05:00

On Tuesday, Mr Harbeck assigned us yet another skills blog post. For this post we have to define the word reciprocal, explain how it's used in math, and find at least 4 different ways.

RECIPROCAL: Reffered to multiplicative inverse. When 1 is divided by x, multiplyed by x, it will gived the product of 1.

Zero does not have a reciprocal.

How reciprocal is used in math: Reciprocal is quicker and easier than dividing fractions. Reciprocal is also used when you are doing ratio tables.

What is the reciprocal of 3/1? It's 1/3, we just flip the numerators and denominators.

EXAMPLES:

The ratio table

Here, I'll show you 3/4 divided by 2/5 using a ratio table.

QUESTIONS:

1) 3/4 divided by 3/5

This question means... How many groups of 3/5 are in 3/4?

The reciprocal of 3/5 is 5/3, and the reciprocal of 3/4 is 4/3.

The answer is going to be more than 1 because 3/4 is larger than 3/5.

2) 3/5 divided by 3/4

This question means... How many groups of 3/4 are in 3/5?

The reciprocal of 3/4 is 4/3, and the reciprocal of 3/5 is 5/3.

The answer is going to be less than 1 because 3/5 is smaller than 3/4.

Fractions Post

2009-05-09T11:12:00.003-05:00

Liem's Last Fraction Post

2009-05-08T20:31:00.041-05:00

FRACTIONS

Okay! We are almost done doing fractions, and now we have to review what we learned during the course of Fractions!

Okay first, what the heck is a fraction? We been doing this for weeks and we should be able to explain what a fraction is. A fraction has a numerator and a denominator, the numerator shows how many parts or pieces you have and the denominator expresses how many equal parts there are in a whole. There are 3 types of Fractions, an improper fraction, mixed number and a proper fraction. For example I will show you a picture of a mixed number.
Now I'll explain how to add fractions, subtract, multiply and even divide them! First of all lets do Adding Fractions!

Adding Fractions: When adding fractions, you must have same size equal pieces! To do that you must find a common denominator or cross multiply.. Heres are 3 examples of adding fractions:Remember to also simplify your answer but since 7 is a prime thats about it for the answer. Remember if you answer is a improper fraction, you must simplify it to a mixed number.
Okay lets do another example..
Since the other denominator is 4, you don't have to do anything to it. Also try thinking it like money! Now for my final example(:
Okay now for Subtracting Fractions: Subtracting Fractions is like the same thing as adding but your just doing the opposite. You also need to find a common denominator when your subtracting, then you can subtract your fractions.
Now for another example:
Now for another example with mixed numbers:
Now for multiplying fractions! It's very easy, you just need to remember multiply the numerator and denominator and simplify after! When multiplying mixed numbers just change them to improper and do the same steps from before!

Heres an example: Heres another example: Heres another example with mixed numbers:
Now for division! There are three ways you can divide fractions. First of all, you can draw a picture to represent the fractions and divide them but it takes time. Another thing you can do is make a ratio table. To use the ratio table, we place the fraction that is being divided on the left side of the table, and the divisor fraction on the right side of the table. Then you mutliply or divide to make the fraction on the right a whole number. And you will have your answer. You can also use the reciprocal, which is less time consuming. All you have to do turn the second fraction upside down, and multiply.
Now for 3 examples of dividing fractions:

And finally Reciprocal..
Now for 2 word problems:

Thanks for viewing my post! Comment and tell me if I made any mistakes, well bye!

Skills Reciprocal

2009-05-08T20:22:00.006-05:00

For our skills post we had to look up the word Reciprocal. Reciprocal means; A number related to another in such a way that when its multiplied their product is one or you can called it Multiplicative Inverse.

We can use this and other techniques to get answers to our questions.
Here is an example:

Now I'll show you 3 ways I can do 3/4 divided by 3/5. First I'll show you with a ratio table

You can also estimate your answer so you know roughly where its around. Ask yourself how many groups of 3/4's are in 3/5's? Less than 1 or more than 1. Its less than one.

And heres an example of reciprocal.

Nikki Lopez's Last Fraction Post

2009-05-08T19:51:00.026-05:00

Hey everyone! Mr. Harbeck told us to make a fraction review post, so this is mine. In my post you'll learn how to add, subtract, multiply and divide fractions. Such as mixed, improper and proper fractions.

What is a Fraction?
A number ususally expressed in a form a/b. A fraction has a numerator and a denominator. The numerator is the number on top of the and shows how many parts you have. The denominator is the number at the bottom and it shows how many equal parts there are in the whole.

eg.

Now that you know what a fraction is, you should also know the different kinds of fractions there are. The different kinds of fractions are proper, improper and mixed. A proper fraction is the one I showed above^^.

An improper fraction is when the mumerator is larger than the denominator. An example would be 5/3. You could convert them into mixed fractions. A mixed fraction is a whole number and a fraction combined. An example would be 1 2/3.

You convert mixed fractions into improper fractions by multiplying the denominator with the whole number and adding the numerator. The result would be the numerator and the denominator stays the same as the denominator of the mixed fraction.

Adding and Subtracting Fractions

To add fractions, you have to make sure that you have the same denominator. If you don't then use just find the least common multiple of the denominators or you cross multiply.

To subtract fractions have the same steps as adding fractions, instead you subtract.

Here are my questions.

Multiplying Fractions

Multiplying fractions is really simple. All you got to do is to multiply the numerators and multiply the denominators. Then simplify.

Here are 2 examples.

Dividing Fractions

Here a lot of ways to multiply fractions one way is to multiply the first fraction the second fractions reciprocal. You could also use the secret fraction solving tool called the Ratio Table. It works every time.

This is how you divide proper fractions.

First picture:

Second picture:This is how you divide mixed fractions.Word Problems

Sorry if I made any mistakes.

Vincent Hoang Last Fraction Post

2009-05-08T19:45:00.011-05:00

Today in Math, Mr. Herbeck told us to show all your fraction unit from adding to dividing. I got 2 adding 1 subtracting, 2 multiply and 2 divide. I also got 2 more word problems to show you. I didn't use paint to do this because it might take me a really long time, so i did it in paper. Its really colorful! Well lets get started! I'll show you the 2 addings. Ones mix and one is not.

Adding Fraction

Adding mix fraction!

Subtract fraction!

Well those are the step 1. Now for step 2 witch Multiplying fractions. I got 2 and I bet you know! That's right, 1 mix and 1 that is not mix.

Multiplying Fractions

Multiplying Mixed Fraction

K now the step 3! The 2 last dividing!

Dividing Mixed Fraction

Divide Fraction

Step 4, the last one. Its the word problem. Mr.Herbeck told us to pick 2 word problems from the post so i did. Here are the question and answer

Problem 2!

Problem 3

Linda's Last Fraction Post

2009-05-07T18:30:00.024-05:00

Hello everyone! Mr. Harbeck assigned us all to do a fractions review post so this is mine. In this post you'll learn about how to add, subtract, multiply, and divide mixed, improper, and proper fractions. The first thing we need to know about how to do all this is to know what a fraction is first of all. A fraction is a part of a whole. They're expressed as a/b usually.
eg.
1/2 The two is the whole, or the total amount of possible pieces to make one whole. The one indicates how many pieces there are in the fraction.

ADDING FRACTIONS

When adding fractions we basically compare. When we compare fractions the wholes must be the same size. So when adding, we must find a common denominator. The easiest way to do so is to multiply both the numbers, although it is not the only way.

In the image above the example is 1/2 + 3/4. As mentioned previously, when adding fractions we basicially compare so when we compare the wholes need to be the same. For the wholes to be the same we must have a common denominator. Luckily, in this example 4 is our common denominator. So we re-write out equation with 4 as the denominator. Since our denominators have changed, so must our numerators. Whatever you do to the bottom, you must do to the top. So we ask ourselves, what did we do to 2 to get 4? We multiplied by 2, so we multiply the numerator by 2. So our answer is 2/4, the equivalent fraction to 1/2. What did we do to 4 to get 4? We multiplied by 1. So we multiply 3 by 1, 3/4. Remember to simplify, or change improper fractions to mixed numbers.

SUBTRACTING FRACTIONS

Like adding fractions, to subtract fractions we also find a common denominator. Once you've found a common denominator and the numerators are changed appropriately, you can then normally subtract the numerators.

Subtracting mixed fractions is basicially the same as subtracting any old fraction, except you need to make the mixed fraction into an improper fraction. To do so, you multiply the whole number by the denominator and add the numerator to find the numerator, and the denominator stays the same. Then, you can subtract as you usually do.

MULTIPLYING FRACTIONS

Multiplying fractions is a fairly simple business. To multiply fractions, you multiply the numerator by the numerator, and denominator by the denominator. Your answer could quite conceivably be somewhat of a large number. It is best to simplify to lowest terms, as shown in the image above.

DIVIDING FRACTIONS

There are many ways to divide fractions. One of the simplest ways to divide fractions, is to multiply the first fraction by the second fractions recipricol. This method works everytime. Refer to the image above to see an example of this method. Remember to always simplifly to answer to lowest terms.

Another way to divide fractions is to use a ratio table. Mr. H's analogy of Paint Can and Room works well in interesting ways. To use the ratio table we find how many paint cans are needed for one whole room, in theory. On the left side is PC, or paint can. On the left, is RM, or room. RM is where the second fraction goes. We're trying to find out how many times the second fraction (RM) goes into the first fraction (PC). So, we need to get the fraction on the right to one whole. (eg. 5/5, 1/1, 3/3, etc. etc.) Remember, whatever you do to one side, you do to the other.

Once you have reached one whole, whatever the answer on the left is, should be your answer. To check if your answer is correct, you can try other methods. If both your results are the same, your answer is most likely correct.

WORD PROBLEMS

Ned has 10 chocolate bars and he is giving his brother 2/3 of his 10 chocolate bars. To find a fraction of something you multiply. I multiplied the amount of chocolate bars Ned has, and the amount he promised to give his brother. Ned should give his brother 6 2/3 chocolate bars.

Ned's brother does not get all whole chocolate bars, because one of them is 2/3, which isn't a whole.

We're to solve this word problem two ways and here is the second way I solved this word problem.
I used 10 as a representation of 100% because it's an easy number to work with. I then converted 2/3 into a decimal and then into a percent as well, which was 66.6 repeated. Roughly speaking, 66.6 repeated is quite close to 6 2/3. I also used pictures to solve this question, to make absolute sure and to see if all my answers were the same.

The image above is an representation of the chocolate bars. Each chocolate bar was split into 3 equal pieces. 2/3 of each chocolate bar was coloured in. If I were to make the chocolate bars wholes, I would have 6 2/3 chocolate bars.
So, Ned's brother really doesn't get all whole chocolate bars because of the 2/3 that is left over.

The best way to answer a word problem such as this would be to use a ratio table, and when we use a ratio table we're dividing.

15 scoops of flour make 6 2/3 cakes. What I did here was began with 2 1/4 scoops equaling 1 cake. My objective was to find out how many cakes 15 scoops made, so I plugged 15 under scoops. Then I had to figure out how I got from 9/4 (improper version of 2 1/4) to 15/1, which is the same as saying 15. I used some simple algebra and found that I had to multiply 20/3 to get from 9/4 to 15/1. Since I did that to one side, I have to have done it to the other side. On the cake side, I got 6 2/3.

Thanks for your time everyone! I hope this post was up to standards. If you have any questions concerning this post or something is incorrect feel free to comment!

Skills Assignment #4

2009-05-06T20:06:00.007-05:00

Today in Skills, we have one more skill post and we have to find at least 4-5 different ways and what is the meaning of Reciprocal. So I got 4 different ways, I'll show you it in pictures. Here is one way.

Reciprocal: Also called Multiplicative inverse Mathematics. the ratio of unity to a given quantity or expression; that by which the given quantity or expression is multiplied to produce unity

The Ratio table!

Theirs Also another step with Ratio but its kinda confusing on this. You just change the Part R (N and D backwards ) Like 3/4 and you times for divide like divide by 3 and times 4

Next is pictures!

K well this is my last one and I think this will be the easy one! Its call something in Reciprocal.

Pictures:

Okay that's all the things I know how to find the answers! Sorry if I might get some wrong showing!

Skills Assignment 3; Multiplying Fractions

2009-05-05T19:37:00.019-05:00

Last week Mr Harbeck assigned us our last skills assignment post, we were asked to explain if 2/5 of 3/4 are the same as 3/4 of 2/3 are actually the same just the fractions are switched around. Well let's prove it with pictures if 2/5 of 3/4 are the same as 3/4 of 2/3.

2/5 OF 3/4

3/4 OF 2/3

So basically they are the same.

Skills Assignment 4: Reciprocal

2009-05-05T10:20:00.017-05:00

Today, we were assigned yet another blog post. We have to define the word reciprocal, explain how it's used in math, use reciprocal in 2 questions (3/4 divided by 2/5 and 2/5 divided by 3/4) and guess if it's either more than or less than one.

Definition:

In mathematics, the reciprocal can be referred to multiplicative inverse. When 1 is divided by x, multiplied by x, it will give the product of 1.

In general, the fraction's reciprocal is attained by alternating the numerator and the denominator.

How is it used in math?

Using reciprocal is easier and quicker than dividing the fraction. It's used when you are doing ratio tables. We use the denominator to multiply the fraction, then divide it by the numerator to make a whole number.

Guesstimate:

3/4 / 2/5. I think it's more than 1.

2/5 / 3/4. I think it's more than 1.

Examples:

3/4 divided by 2/5.

As you can see, we used reciprocal to get a whole number; we used the denominator (5) to multiply the fraction, then divided it by the numerator (2). What you do on one side of the ratio table, you have to do the same thing to the other. But, we weren't able to divide so we had to figure out how many times does 4 goes into 15. Then you'll have your answer.

Again, we did the same thing as the first question.

Skills: Reciprocal

2009-05-05T10:11:00.013-05:00

Today, we were assigned to do another blog post. We have to put the definition of the word reciprocal, explain how it's used in mathematics and show 2 examples.

Reciprocal, also called multiplicative inverse, is a number that you multiply so that the result equals 1. The easiest way to find it is to just flip the fraction over.

We use reciprocal or multiplicative inverse in math because it is faster, quicker and easier to understand. it can be used in a ratio table.

Example:

3/4 divided by 3/5
This question means - how many groups of 3/5 are in 3/4?
The reciprocal of 3/4 is 4/3 and the reciprocal of 3/5 is 5/3.

The answer is going to be more than 1 because 3/4 is larger than 3/5.
The ratio table:

3/5 divided by 3/3
This question means - how many groups of 3/4 are in 3/5?
The reciprocal of 3/5 is 5/3 and the reciprocal of 3/4 is 4/3.

The answer is going to be less than 1 because 3/5 is smaller than 3/4.
The ratio table:

Skills : Dividing Fractions[redo]

2009-05-05T10:09:00.011-05:00

reciprocal
to match, equivalence,
noting expressions, relations etc.

example of using this
6/5 divided by 3/4 ='s 1 3/5

........_______l________ <~ T-Table
......[x4] 6/5..l..3/4 [x4]
..........24/5..l..12/4
.[divided by 3].l..[divided by 3]
...........8/5...l..4/4
..................l

reciprocal being used in this question is the x4 and divide by 3 on both sides.
[doing the same thing ] (to match) [equivalence].

Multiplying Fractions

2009-04-30T08:46:00.002-05:00

Multiplying Fractions

2009-04-29T22:40:00.004-05:00

Math multiplying fractions

2009-04-29T21:46:00.004-05:00

Robin & Richard's Math Questions

2009-04-29T21:24:00.001-05:00

Math homework Avery's and Vincent's

2009-04-29T20:26:00.003-05:00

yesterday we had a homework in math and we were suppose to do it in groups of 2. So here are the questions and answer.

Scribe Post for April 29th, 2009

2009-04-29T15:59:00.010-05:00

Today we learned how to divide Fractions and some of it's differences from multiplying fractions.

Such as, what the two different math types say.
eg. 6 / 1/2 = this division question would say, how many groups of 1/2 are in 6
6 * 1/2 = this multiplication question would say 6 groups of 1/2

Homework:
We had 3 questions for our homework and we`d have to show how to do all of them 2 ways,
I`ll show photos on how to do the last 2 questions.

6 / 2/3 ,
1/2 / 1/4 ,

2 / 3/4 ,

Multiplying Fractions

2009-04-29T12:16:00.002-05:00

Multiplying Fractions

2009-04-29T07:34:00.003-05:00

Today in Math class, Mr. Harbeck gave us an assignment. He gave us a sheet of paper with word problems. You and a partner are supposed to answer all of the word problems and put it in Google documents, a picture or just blogger and send it to your partner. Here's our Google presentation:

Question Word Problems

2009-04-29T00:58:00.002-05:00

We were given an assignment to complete 8 word problems with a partner and showcase the work using some blogger, google docs, etc. Below is Alex's and my presentation. Please comment, and hopefully enjoy! (:

Questions!

2009-04-28T22:18:00.004-05:00

These are the answers to our questions! Done by Liem and Jowella!!

Kevin and Rinorm's post [April 28, 2009]

2009-04-28T21:03:00.003-05:00

Kevin and Rinorm's post for fractions.

6. One week, Kristi worked 3 days at a department store for 3 1/2 hours each day. She was paid $9 per hour.

a)How many hours did Kristi work that week? Show your thinking.

3 1/2 x 3=

I will turn the mixed number into an improper fraction now.

7/2 x 3=

21/2=

10 1/2=

Kristi worked 10 1/2 hours that week.

b)How much did Kristi earn that week?

I will take the hours that she had worked this week

10 1/2 x 9=

I will turn the mixed number into an improper fraction now.

21/2 x 9=

189/2=

94 1/2=

She earned $94.50 that week.

11. Owen is 2 1/4 times as old as Robin celebrates his 8th birthday, how old will Owen be?

2 1/4 x 8=

9/4 x 8=

72/4=

18=

Owen is 18 years old when Robin turns 8.

12. The karate club is arranging a grading for its members. It takes 3 1/4 hours to test a group of 4 candidates. How long will the club need the gym in order to process 3 groups of 4 candidates each?

3 1/4 x 3=

13/4 x 3=

39/4=

9 3/4 hours=

It would take 9 3/4 hours to test 3 groups of 4 candidates.

9) The distance to Grandma's house is 4/5 of the distance to Uncle Glen's house. If Uncle Glen's house is 3 1/2 hours away, how long will it take to get to Grandma's house if you travel at the same speed?
3 1/2 x 4/5=
7/2 x 4/5=
28/10=
2 8/10=
2 4/5
It will take 2 4/5 hours to get to Grandma's house.

10) It takes 3/5 of a tank of gas to get to work and back each day. How much gas is used over 5 work days? Show your thinking.
3/5 x 5=
3/5 + 3/5 + 3/5 + 3/5 + 3/5=
15/5=
3
3 gas tanks is used over 5 work days.

7) Jupiter completes about 2 2/5 rotations every 24 hours (an Earth day). How many rotations does Jupiter complete in one Earth week? Show your thinking.
2 2/4 x 7=
12/5 x 7=
84/5=
16 4/5
Jupiter completes 16 4/5 rotations in 1 Earth week.

8) A sailboat is sailing at 8 1/2 km/h. If the weather conditions and the current do not change, how far will the sailboat travel in 1 1/3 hour? Show your thinking.
8 1/2 x 1 1/3=
12/2 x 4/3=
68/6=
11 2/6
The sailboat will travel 11 2/6 km in 1 1/3 hours.

Multiplying Fractions Questions

2009-04-28T19:53:00.018-05:00

Today, Mr. Harbeck assigned us 7 questions for multiplying fractions. We had partners, and we had to create a post explaining our answers.

6. One week, Kristi worked 3 days at a department store for 3 1/2 hours each day. She was paid $9/hour.

a) How many hours did Kristi work that week? Show your thinking.

To get the answer, multiply how many days she worked by how many hours she worked each day.

Kristi worked 10 1/2 hours in that week.

b) How much did Kristi earn that week?

Kristi earned $94.50 that week.

7. Jupiter completes about 2 2/5 rotations every 24 hours (an Earth day). How many rotations does Jupiter complete in one week? Show your thinking.

To get the answer, you multiply the number of rotations Jupiter completes every 24 hours by the number of days in a week.

Jupiter completes 16 4/5 rotations in one Earth week.

8. A sailboat is sailing at 8 1/2 km/h. If the weather conditions and the current do not change, how far will the sailboat travel in 1 1/3 h? Show your thinking.

To get the answer, you multiply the amount of speed its going a km per hour by the amount of times to been travelling.

The boat will travel 11 1/3 km in 1 1/3 hours.

9. The distance to Grandma's house is 4/5 of the distance to Uncle Glen's house. If Uncle Glen's house is 3 1/2 hours away, how long will it take to get to Grandma's house if you travel at the same speed?

To get the answer, multiply the distance to Uncle Glen's house to Grandma's by how many hours away Uncle Glen's house is.

It will take 2 hours and 48 minutes to get to Grandma's house.

10. It takes 3/5 of a tank of gas to get to work and back each day. How much gas is used over 5 work days? Show your thinking.

To get the answer, you multiply the the fraction of how many gas is used in one day by how many days it is used for.

3 tanks of gas are used over 5 work days.

11. Owen is 2 1/4 times as old as Robin. When Robin celebrates his 8th birthday, how old will Owen be?

To get the answer, you have to multiply Robin's age (8/1) by how much older Owen is than Robin (2 1/4).

On Robin's 8th birthday, Owen will be 18 years old.

To get the answer, you have to multiply how many hours it takes to test a group of 4 by how many groups are there in total.

It will take the club 9 hours and 45 minutes to process 3 groups of 4 candidates.

Scribe Post for Monday, April 27th, 2009

2009-04-28T16:10:00.003-05:00

Im sorry that this scribe is a little late but Im going to make up for it by helping a few of you understand what we are doing in class these days. We are learning about multiplying fractions.

Now here are a few questions and answers for you.

(left=numerator right=denominator)

9/10 x 5/18=

You multiply the numerators then the denominators.

Now you simplify the answer

45/180 divided by 5 is 9/36

Simplify the answers even more

9/36 divided by 9 is 1/4

The final simplified answer is one fourth

14/3 x 6/7=

To help you answer this question you could switch the numerators because nothing would happen if you just switch the numerators around a little to make it look more friendly.

6/3 x 14/7=

As you can see I switched the numerators. 14 is now over 7 and 6 is now over 3.

6/3 x 14/7=2 x 2=4

The final answer is four.

Well, I have to go now. Sorry if I have not explained it to you properly but hey, at least I tried. If you did understand me then good for you (Y) Please comment and sorry for such a short scribepost.

April 27 2009 Mark and Josh

2009-04-28T15:51:00.009-05:00

Hello! Today in class we were given homework with a partner. In this post Josh and I(Mark Marquez) will show you what we did. Josh did 6, 7, and 8. Mark is doing 9, 10, 11, and 12.

7)
8)

10)

11)

12)

skills assignment

2009-04-27T10:45:00.001-05:00

click the picture (:

Skills Assignment 3

2009-04-27T10:26:00.004-05:00

Today in Skills, Mr.Herbeck gave us an assignment. This assignment would give us 10 extra mark so I might as well do it for extra marks.
Question: Are 2/5 of 3/4 the same as 3/4 of 2/5?
Well do they look the same to you? Well lets find out by using Pictures and numbers!

1. 2/5 and 3/4

Well Since the other one is still the same, do you think I'm still going to do it? Yes but in Picture!

Well I guess their both the same. Thank you for looking at my assignment! :)

2009-04-27T10:25:00.004-05:00

cliiiiick the picture!!! (:

Skills Assignment #3

2009-04-27T10:24:00.001-05:00

For our third skills assignment we had to explain if 2/5 of 3/4 the same as 3/4 and 2/5?
Okay, 2/5 of 3/4 and 3/4 of 2/5 are actually the same but the fractions are just switched around. Okay lets draw a picture of them showing how they are equal.So I guess their the same! Thanks for viewing my assignment!!

Skills: Fractions 3

2009-04-27T10:14:00.008-05:00

In skills class, we were assigned to do another post about fractions. The question is: Are 2/5 of 3/4 the same as 3/4 of 2/5? We will find out by using pictures.

This is 2/5 of 3/4 :

To find out how to do this you need to multiply the fractions and to do that you have to multiply the numerators and the denominators.
numerators: 2 x 3 = 6
denominators: 5 x 4 = 20
So the answer is 6/20 or when simplified: 3/10

This is 3/4 of 2/5:

numerators: 3 x 2 = 6
denominators: 4 x 5 = 20

So, as you can see they're the same (:

Skills Assignment 3

2009-04-27T10:08:00.013-05:00

For our third post for math skills, we were assigned to explain if 2/5 of 3/4 are the same as 3/4 of 2/3. To find out, I am going to use pictures and multiplication.

2/5 of 3/4

Multiplication:

Picture:

______________________________________________________________

3/4 of 2/5:

Multiplication:

Picture:

As you can see, 2/5 of 3/4 and 3/4 of 2/5 are the same. They both are equivalent to 6/20.

Skills Post # 1

2009-04-26T21:36:00.004-05:00

One day In class Mr.Harbeck was teaching us about fractions and how 2 fractions can be the same, but one is more precise.

Question 1. 2/3 or 3/4

They both look the same. 2/3 is 4/6 simplified. One is more precise.

4/6 is more precise than 2/3. That is true because if you were to turn those to fractions in to decimals ... it would be.. 0.6666667 ( 2/3 ) and.. 0.66666667 ( 4/6 ).

4/6 is more precise because it has more place value.

Question 2. 1/8 or 1/4

1/4 is obviously bigger than 1/8 ... but why ?
If you look at the picture above , 1/4 is a bigger portion than 1/8. When you look at the denominator you see that 8 is bigger than 4 , so many people might think that 1/8 is larger than 1/4. But when you look at a fraction... the lower the denominator , the bigger the piece. What would you rather have.. 1 of 4 slices from a pizza or 1 of 8 slices from a pizza? 1 of 4 right? Because its cut into less pieces which makes each piece bigger.

Scribepost

2009-04-26T16:26:00.019-05:00

Scribe post for April 23!(Fractions~)

On Thursday, we had a word problem about fractions...It was about Carrol Gardens and Flatbush. they both have an area of 100mx50m.

The question is...Who gets more hard top? Explain your answer... (pretend that you are explaining it to a person who doesn't know a lot about fraction...)
Carrol Gardens has: 3/4 playground 2/5 hardtop Flatbush has: 2/5 playground 3/4 hard top
Now we have to compare 2/5 to 3/4. But how???(I bet right know you could tell who had more hardtop right?but getting the answer isn't that important as to how you got the answer...)
There are a lot of ways to explain how you got the answer. Like...drawing a picture.

As you can see, 2/4 is more than 2/5. This is one way you can prove you're right...but is this really enough?Well if you can't draw... then you need to back up you answer with........decimals and

percents.
How do you convert fractions into decimals???
It's not that hard to do, just divide the numerator from the denominator.Like this:
2/5
2 divided by 5=0.4
3/4 3 divided by 4=0.75
Then compare..
You can see that 0.75 is larger than 0.4(or 0.40 it doesn't really make a difference, it just makes it more easier to compare)
This it another way you could show your thinking...There is one more way I could show you how you can show your thinking.It's making the denominators the same.Like this:
So now that you know that 2/5(8/20) is smallar that 3/4(14/20) You can say that Carrol Gardens has more hardtop than flat bush because 2/5(flatbush) is smaller than 3/4(Carrol Gardens)

Skills Assignment #2

2009-04-25T21:53:00.005-05:00

On Thursday Mr.Herbeck gave us a skill homework. Its about Fraction, I'll show you 2 ways of finding the answer in subtracting fractions. Here is one way of finding the answer. (In subtract)
This is Borrowing

Now there is another way of finding the answer in mixed subtract fraction. Here is another way. This is call the improper fraction way.

Well those are all the way of finding the answer of mixed subtracting fractions. You can find more but I don't their is more. Well thanks for looking at my assignment! BYE!!

Skills : Fractions 2

2009-04-25T18:25:00.011-05:00

In math class, we talked about subtracting fractions. To be able to subtract fractions, it has to have the same denominators. To get the same denominator you look for the lowest common denominator for example: 1/4 - 1/8, you can't subtract that because the denominators are different so you have to look for the lowest common denominator which is 8, you need to change 1/4 so the numerator is 2 and the denominator is 8. 2/8 - 1/8, is much better and you can now subtract. Mr. Harbeck also taught us how to subtract mixed fractions using two very effective techniques.

The first one is: turning it into an improper fraction, denominator x whole number + numerator = improper fraction. For example: 2 1/2 - 1 3/4 = ?, if you change it, it will be like this: 2 2/4 - 1 3/4. You can subtract 2 and 1 but you can't subtract 2 and 1 so you have to change it into an improper fraction: 10/4 - 7/4 = 3/4

The second one is: the borrowing technique, we use this when the numerator is too big. For example: 625 1/2 - 100 3/4 = ? or as an improper fraction: 1251/2 - 403 = ?, isn't that a bit more complicated? But, if you just borrow like this: ( 624 4/4 + 2/4) - 100 3/4 = ?, is much better because all you have to do is this:

Add 624 4/4 and 2/4 and the answer is 624 6/4. Then, you subtract 624 6/4 and 100 3/4 and the answer is 524 3/4.

Now, subtracting fractions are much easier whether it's improper, proper or mixed. (:

Scribe post for April 23

2009-04-25T15:30:00.009-05:00

Sorry if I created my post 2 days later, but on Thursday we were assigned a question. The question was to see which park had more hardtop than the other (Carrol Gardens and Flatbush). The information contained that 3/4 of Carrol Gardens will be playground; 2/5 of the playground will be hardtop. For Flatbush, 2/5 of the lot will be playground; 3/4 of the playground will be hardtop. Both of the parks are 100m x 50m. Is one neighbourhood getting more than the other? Well, let's draw a picture.

Carrol Gardens:

If you divided Carrol Gardens into fourths of the park and colour 3/4 of it, that will be your playground. Then if you divided the playground into fifths and colour 2/5 of it, that will be your hardtop. The hardtop is 6/20 of the park.

Flatbush:

If you divided Flatbush into fifths and colour 2/5 of it, that will be your playground. Then if you divided the playground into fourths and colour 3/4 of it, that will be your hardtop. The hardtop will also be 6/20 of the park.

As you can see in the pictures, you'll have the same amount of hardtop. So, to the answer of my question... no, one neighborhood is not getting more hardtop than the other.

If my answer is incorrect, please feel free to correct. :)

BOB on Fractions

2009-04-25T00:06:00.008-05:00

As you might know, we were able to get a bonus mark if we did a post on what we learned about fractions. So, this is mine...

One thing I learned about fractions was adding them. I didn't know you were supposed to have a common denominator when you were adding them, but now I understand that the denominator must be the same when comparing two or more wholes. After all, you wouldn't compare a Blu-Ray player with a VCR, right? It just wouldn't make sense. The wholes must be the same size.

One thing I had difficulty with was using the 'borrowing' technique. I didn't quite understand it because it had initially confused me at first. Mr. H had said it was much easier compared to

changing a mixed number to an improper fractions and all that. But once I looked over the example a few times I finally understood what we were supposed to do when 'borrowing', and it really is much easier and less time consuming rather than changing the mixed number into an improper fraction. Just think about all the paper and graphite you'd be saving! ;)

Overall, I learned a lot about fractions. I never really enjoyed learning about fractions before but learning about the 'borrowing' technique has really begun to brighten my perspective on the whole subject. I hope this post isn't late!

Scribe Post for April 23 2009

2009-04-24T15:24:00.015-05:00

Hi everyone! During yesterdays math class we were given a word problem about parks in New York City. The parks were Carol Gardens and Flatbush. People think that the children of New York City should get a place to play, so they decided to make some lots have a playground and some blacktop so that children were able to play blacktop games, like basketball for instance.

Both places have the same area, 100 M by 50 M. 3/4 of the lot will be playground and 2/5 of the playground will be hardtop. Our goal is to find out which park will have more hardtop. Note that both lots are rectangular.

Flatbush

The image above is a representation of the Flatbush lot. 2/5 of the whole lot is the playground. Above is a representation of how much of the lot will be playground. Now 3/4 of that 2/5 will blacktop.
We're trying to find how many times 3/4 will fit into 2/5 evenly, since 2/5 of the lot is playground and 3/4 of that (2/5) is hardtop. To do so we divide 2/5 by 3/4.
One of the most easiest ways to compare fractions is to divide the numerator by the denominator, or finding the decimal. 8 divided by 15 is 0.53 repeated.

Carol Gardens

Above is a representation of Carol Gardens. As you can see it is identical to Flatbush. 3/4 of the whole lot is the playground.

2/5 of the playground (3/4 of the whole lot) is hardtop.

The darker shaded area is the hardtop. We're trying to find how many times 2/5 can fit into 3/4 evenly, because 3/4 of the lot is the playground and 2/5 of that is the hardtop. To do that you divide 3/4 by 2/5.

1.875 is 15/8 in decimal form.

Which brings us back to our main goal... Which park gets more blacktop than the other?
As mentioned previously, one of the easiest ways to compare fractions is to convert the fraction into a decimal. Flatbush gets 8/15 of hardtop, or 0.53 repeated. Carol Gardens gets 15/8 of hardtop, or 1.875. So, Carol Gardens gets more hardtop than Flatbush. I hope this helps and that you're all well! (:
Please feel welcome to comment if I've made a mistake, or have done this word problem incorrectly!

The next scribe will be Nikki.

April 20/2009 scribe post

2009-04-20T16:15:00.004-05:00

Today's homework was 10 questions from page C-42 E,D,T,H,(top half) E,N,W,H(bottom half) but ... I will only go over 5 of them! :) First question: E) 3 11/12 + 7 3/8= 22/24+9/24
= 31/24 <----- How many times does 24 go into 31 ? once = 1 whats left over? 7/24 +1 3+7=10 +1=11 +7/24 117/24
D) 51/3-1 2/7= 7/21-36/21 =29/21 <------- How many times does 21 go into 29? 1 8/21 5-1=4+1
= 5 8/21

T) 2 4/9 + 5 1/2 = 8/18+9/18 =17/18 2+5=717/18 H) 12 5/6 - 11 8/9 = 45/54 - 24/54 = 21/54 12-11= 1 21/54

-------------------------------------------------------------------------------------------------
Bottom half
N) 27 7/8 - 2 4/5 = 35/40- 32/40 = 3/40 27-2 = 25 3/40 Hope you enjoyed my scribe! :) Sorry if there are mistakes! ") The next scribe will be KEVIN !!!! Haha!

Scribe Post for April 17th

2009-04-19T19:26:00.009-05:00

Today in Math class, Mr.H gave us a worksheet with subtracting ad adding fractions.

Here are 5 questions that I answered, from the worksheet p.42

N.

E.

T.

D.
H.

Skills Assignment #2

2009-04-18T17:45:00.011-05:00

On Thursday we were had an assignment in Math Skills. This time we had to make a post about subtracting fractions using 2 techniques, one is good at some times and the other is good at other times. The two ways you can subtract mixed fractions is to make them improper first then subtract. Or if the mixed numbers are too big, we can use a borrow technique.

The proper time to borrow is when one of the mixed numbers is too big. It would just be harder to make it an improper fraction first then go from there on. For example:100 2/4 - 6 3/4. Unless you want to do like 1,000 push ups, do it the easier way, borrowing. As you can see you can't take 3 with you have only 2.
Okay now I'll show the proper time to use the improper way to subtract fractions. The proper time to use fractions is when the numbers are small and when you can't take away something bigger when you have something smaller to begin with. For example:
See how you can use both ways to subtract fractions! Sometimes one is more faster than the other but you can do either one, they both work!

Scribe Post for April 17, 09

2009-04-17T19:03:00.013-05:00

Scribe Post!!

Today, we got a worksheet to do and I will explain 5 questions on page 42, mixed numbers. Okay the first question is 3 9/10 + 2 13/16=??? Okay first we add the whole numbers okay? Well let me draw this out for you! Sorry if my drawing sucks.. Okay now for the second question. The question is 3 11/12+ 7 3/8.
Okay, for our next question 1 1/8 + 11/13=? Okay first we add up the whole numbers which is only 1. Next lets add the fractions 1/8 and 11/13, to add them up we need a common denominator or same size peices. So we multiply 8 by 13. Which is 104. Now the fractions are 13/104 + 88/104= 101/104 now we add the whole number and our answer is 1 101/104!
Now for our fourth question! The question is 5 1/3 - 1 2/7.
Okay for the final question! It is 2 4/9+ 5 1/2=??
Okay thats it guys! Jowella will do page 41, so if you need help on that go look at her post!
I pick Camille for the next scribe! HAHA

SKills Post 2

2009-04-17T10:15:00.023-05:00

Sometimes when subtracting fraction you first have to turn them into improper factions, you can also borrow from the fractions.

A good time to switch to improper factions first is when you find out you can't subtract the numerators and the fractions are small. ,
2 1/2 - 1 3/4 =
2 2/4 - 1 3/4 =
= ?

You can't subtract 3 from 2 so you have to start the question with improper factions,
2 1/2 - 1 3/4 =
5/2 - 7/4 =
10/4 - 7/4
=3/4
These questions are an example of when you need to do switch to start with improper fractions.

A good time to borrow when subtracting fractions is when the fraction are huge,
625 1/2 - 100 3/4 =
625 2/4 - 100 3/4 =
= ?

When the question ends up with 2 subtracted by 3 is a good time to borrow,
625 1/2 - 100 3/4 =
625 2/4 - 100 3/4 =
(624 + 4/4 + 2/4)
624 6/4 - 100 3/4=
= 624 9/4
The question is now solved by borrowing fractions.

You can do any subtracting question now, you can do it normally, you can borrow, or you can use improper fractions

Skills Assignment 2

2009-04-17T10:15:00.022-05:00

Sometime last week, we were assigned another assignment in Skills class. But instead, we have to make a post about subtracting fractions that should borrow, and fractions that should use improper.

The proper time to borrow is when you need to subtract the two fractions but need to use the whole number to do so or when the number is simply big. For example 12 2/11 - 4 9/11. I will explain to you by using pictures, step by step.

___________________________________________________________________

The proper time to make a fraction into an improper fraction is when the first fraction cannot be subtracted by the second fraction. For example, 6 1/2 - 1 3/4.

Now that we've subtracted the whole numbers, we need to subtract the fractions. In order to do that, we have to firstly find the common denominator. Both of the denominators fit into 4 equally, so our equivalent fractions are now 2/4 and 3/4. 3/4 stays the same because the denominator is already 4.

* To get an equivalent fraction, you have to see how many times the first denominator goes into the new denominator. Then you have to multiply how many times by the numerator. (E.g. 1/2: 4 is the new denominator. 2x4=2. 2x1=2. New fraction is 2/4.)

After you've changed the fractions, you still can't subtract but that's how it's supposed to be. So the next thing you need to do is multiply the whole number with the denominator and add the numerator (just like when you're borrowing).

Finally, all you have to do is subtract the fractions and you'll get the answer.

2009-04-17T10:09:00.005-05:00

cliiiiccck the picture (:

Skills assignment #2; Subtracting Fractions

2009-04-17T10:08:00.016-05:00

A few weeks ago now, we were given yet another skills assignment (skills post), still having to do with fractions. But instead we have to be able to make a post about subtracting fractions that should borrow, and fractions that should be improper fractions.

The proper time to borrow is when... one of the mixed numbers is too big. We can subtract fractions to make them improper or if the mixed numbers in the mixed fractions are too big we can just borrow.

100 2/4 - 6 3/4

PICTURE:

The proper time to use the improper way is when... the numbers are small and when you can't take something larger from something smaller.

PICTURE:

Scribe Post for April 16/09

2009-04-16T16:32:00.006-05:00

Today in class we learned how to subtract mixed fractions. Well its kinda like that but if its like (2/3 - 4/3) that. Than that's what we learn today. Today we had 4 questions of homework and I'll show you how too. the questions are.

- 10 1/2 - 6 7/8
- 19 3/4 - 10 4/5
- 625 1/2 - 10 3/4
- 4 2/3 - 1 3/4

I'll show you how to do the first and last questions and so they 2 middle question are on your own.

How to do 10 1/2 - 6 7/8

Now When you got the answer improper fraction you must simplify it. The answer when you simplify it is 3 10/16

Now for the last on

How to do 4 2/3 - 1 3/4

Simplify = 2 11/12

Well good luck on the last 2 question and also I really sorry if I'm doing it all wrong and if i am doing it all wrong can someone please tell me or comment on my post.

I choose Liem as the next post!

Scribe Post for April 15

2009-04-15T21:49:00.006-05:00

Today in class we corrected our homework from yesterday, then Mr.Harbeck gave us a few questions to do for homework today, which included subtracting fractions.

The questions were : * Going to Explain.

1 ) 1 3/4 + 2 1/5 *

2 ) 10 1/2 + 6 4/5 *
3 ) 3 1/3 + 2 1/4
4 ) 7/8 - 1/4
5 ) 5/6 - 2/3 *
6 ) 4/5 - 1/2
7 ) 13/15 - 4/5 *

1 )

5 )

7 )

For next scribe I choose Liem.

The Green Effect!

2009-04-15T20:21:00.008-05:00

The Green Effect!

Okay guys! I found this really cool idea! Its called the green effect.National Geographic with Sun Chips are joining forces to inspire people to make a change in their communities. We need to compose a letter to National Geographic of 250 words or less explaining what we can do to make our community a GREEENER place. The five best ideas will win $20,000 dollars to help make their community a greeener place.

Some ideas would be like making a garden, putting recycling boxes around parks, making our school more green and other stuff! Imagine if what we can do with $20,000 dollars to make our community more GREEN

For more information please visit http://greeneffect.nationalgeographic.com/
Online voters will choose one winner, and a panel of judges will select the remaining four.

Scribe Post for April 15

2009-04-15T20:12:00.009-05:00

Fractions is what we did today. We checked our homework and all that, and received homework.

Homework list:

Adding Mixed Fractions/Numbers (Don't have to make pictures)
Subtracting Fractions (Must be completed with pictures shown in notebook)

First of all, Mr. Harbeck recommends this method of adding mixed numbers:
1) Add the whole numbers first
2) Add the fractions

3) Then put them together, done.

Questions: Mixed Numbers

By using the method above, we solved this simple fraction problem.
3 1/3 + 2 1/4 3+2 = 5
1/3 + 1/4
4/12 + 3/12
7/12

5 7/12

Questions: Subtracting Fractions

And I choose Jai to be the next scribe.

Second Scribe Post for April 14

2009-04-14T18:37:00.015-05:00

Today Mr. Harbeck told us to solve fraction word problems for homework. I'm going to show you how to solve a question and how to do it. We also did some adding with fractions that Nikki will show you on her post.

I'll show you how to solve the first question.

You also have to do the 4 questions that Nikki showed you for homework.
And if you dont know how to add fractions.. you can click here!

The next scribe will be... ALEX!!!!

Scribe Post for April 14/09

2009-04-14T16:28:00.014-05:00

Today in class, Mr. Harbeck corrected our homework from yesterday. For homework we had 4 questions and 3 word problems. I'm here to show you how to solve the 4 questions and Joysie will show you how to solve the word problems on another post.

First one is 5/9 + 1/3. I'll show you my way of solving it.

My way of solving it is cross multiplying the numbers.

The 2nd question is 1/4 + 2/5.

Third question is 3/8 + 2/3.

Finally, the last question is 7/15 + 2/5.

If you still don't understand how to add fractions click here.

Sorry, if I made a mistake. If I did just leave a comment.

The next scribe is Kevin!!!

Scribe Post for April 13 2009

2009-04-13T20:48:00.007-05:00

Today in class, we learned about adding fractions. Mr. Harbeck gave us an example which was, 1/2 + 1/3. He said it equaled 2/5, and asked if it was correct.

This picture says, 1/2 + 1/3 is bigger than
2/5 when you compare it. So it makes it wrong.

What you need to add fractions is common denominators (you get it by multiplying the 2 denominators) and the same size pieces. So for 1/2 + 1/3, the denominator is going to be 6.

Skills Assignment : Fractions

2009-04-12T17:18:00.006-05:00

In our Math class, Mr. Harbeck was teaching us about fractions, and how you compare them. During our Skills class, Mr. Harbeck told us to find two different ways between two fractions. We were assigned to show if the fractions were the same, smaller, or bigger. The way you find out if a fraction is bigger, smaller or the same is by using a picture, or a decimal.

The first fraction we were given was; 2/3 and 4/6. Is 2/3 bigger, smaller, or the same as 4/6? To find out, let's find the decimal of the two fractions.

DECIMAL :
First you divide 2 by 3, and you get 0.666 [repeating]. Then you divide, 4 by 6 and you get 0.666 [repeating]. So now, you know that these two fractions are the same! Another way you can say they're the same is saying that they are equivalent.

PICTURE :The second fraction Mr. Harbeck gave us was; 1/8 and 1/4. Is 1/8 bigger, smaller or the same as 1/4? To find the answer, we do the same thing as the first one.

DECIMAL :
First, you divide 1 by 8. You get, 0.125, and when you divide 1 by 4. You get, 0.25.
This proves that 1/4, is bigger than 1/8.

PICTURE :

Richard's skills fractions

2009-04-12T16:08:00.008-05:00

Two over three and four over six are the same amout because they are both equivalent, but four over sixth is more precise.

One over eight is lesser than one four because in money one over forth is 25cents and one over eight is 12.5cents,. in percentages one over four is 25% and one eight is 12.5%, that explains that one over four is larger than one over eight.

Skills post by Josh T.

2009-04-12T08:40:00.004-05:00

My terrible thing xD.

2/3 and 4/6
two easy ways to find that they are equal :].
First look you can convert into %'s. How you can do this is you take 100 and divide it by the denominator. So you would split 100 into 3 parts and into 6 parts. When dividing 100 into 3 parts its 33.333 on going but we just say 33.3. So 1 part is 33% add another part to that and it equals 66%. 66% is when you have 2 thirds of a number. Finally you do the same thing to the 4/6 each part is around 16.6% on going so when you add two together its about 33.3 % 2/6 is equal to 1/3 add 2 to 2/6 which is another 30% and you have 2/3 and 4/6 being the same number [ 66% ].

Another way is simplying.
all you have to do is find out if you are able to half the numerator and denominator with it still being a whole number.
When you half 4/6 4 divided by 2 and 6 divided by 2 it is equal to 2/3 which is obviously equal to 2/3.

2 different ways to find which is greater between
1/8 and 1/4
For this you are definetly able to convert into %'s.
you know that 1/4 is 1 quarter of 100. Divide 100 by 4 and that equals 25%. 1/8 is half of 1/4 so that means that it is half of 25. 1/8 is equal to 12.5% which means for sure that 1/4 is bigger.

In decimals this may be a little confusing for some people

0.125 [1/8]
0.25 [1/4]

as you can see the 1/8 looks bigger. But it is not. This is something called place values. here is the example.

0.125[000]
0.25[0000]

It doesnt matter how many 0's are behind it the closest place value to the whole is whats determined to find the real answer.

okay I hope this made sense.

Skills Assignment: Fractions

2009-04-11T15:11:00.018-05:00

During the past week in math class Mr. Harbeck has been teaching us about fractions and how to compare them. During skills class Mr. Harbeck told us to find two different ways between two fractions. With those two fractions we have to show if they're bigger, smaller, or the same. There are two ways to find out when showing if a fraction is bigger, smaller or the same: by using a decimal and a picture.

Lets get started with the first fraction: 2/3 and 4/6. Is 2/3 bigger than 4/6, smaller, or the same? Well, lets get started with finding the decimal of the two different fractions.

DECIMAL:Divide 2 by 3 and you get o.666(repeating) and when you divide 4 by 6 you get 0.666(repeating)

looks the same, right? That's because they are the same, which also means that they're equivalent. But, 4/6 is more precise: accurate or correct.

PICTURE:

Now, lets get started on the second fraction: 1/8 and 1/4. Is 1/8 bigger than 1/4, smaller, or the same? Lets do exactly the same as the last time, lets find out the decimal.

DECIMAL: Divide 1 by 8 and you get o.125 and when you divide 1 by 4 you get 0.25.

You can see that 1/4 is bigger than 1/8... because lets pretend that you have two cakes, one cake is cut into four pieces, and the other cake is cut into eight pieces. The cake that got cut into four pieces would have bigger pieces than the one cut into eight pieces.

PICTURE:

Skills : Fractions

2009-04-11T12:20:00.017-05:00

In math class, we learned about different kinds of fractions and how to compare them. Mr. Harbeck asked us to compare fractions and gave us questions where you determine which fraction is >,< or =".">,< or =" in" style="font-weight: bold; color: rgb(204, 0, 0);">

Decimal:

2/3 = 0.666 (repeating) 4/6 = 0.666 (repeating)
So, 2/3 and 4/6 is equal because it's the same.

* To find out the decimal you have to divide the numerator by the denominator.

Picture:

2/3 and 4/6 may be equal but they are not the same. Let's say you and your friend found a whole pizza in your house. You cut the pie into 3 pieces, 1 for you, 1 for your friend and an extra 1. Then suddenly 2 more people come and asked for pizza so you cut the pizza in 6 and not 3 pieces. Suddenly, your mom comes home and asks how come 2/3 of the pizza is gone? You say 4/6 of the pizza is gone and not 2/3 because 4/6 is more precise. You cut the pizza in more pieces and took more for 4 people.

Another example is 1/4 and 1/8. Are they >,< or ="?" style="font-weight: bold; color: rgb(204, 0, 0);">Decimal:

1/4 -----> 0.25
1/8 -----> 0.125

So 1/4 is larger than 1/8.

Picture:

1/4 is greater than 1/8.Both fractions have 1 as the numerator, fractions with 1 as a numerator are called unit fractions, and different denominators. This one is easier because the numerators are the same and it is larger when it has a smaller denominator. 1/4 is greater than 1/8. (:

Fractions

2009-04-11T08:44:00.008-05:00

In skills class, Mr. Harbeck asked us to create a post about Fraction. You guys might remember these fractions because they were for homework. So for our homework we had to explain if they were =<> (equal,greater than and less than) the fraction pairs we are dealing with are 2/3 and 4/6. And we also had 1/8 and 1/4. So lets start with 2/3 and 4/6 is it greater than, less than equal to? Well if you divide 2 by 3 you get: o.6 repeating then 4 by 6 you get:0.6 repeating so as you can see here, they are both the same. But lets look at it from another standpoint, lets see what it looks like in pictures :

4/6

3/6

wow! they are still them same! But which one is more precise?
I would say 4/6 is more precise.

Now we'll look at 1/8 and 1/4

This time we will do the pictures first,

1/4

1/8

So as we can see, 1/4 is bigger than 1/8.

Okay now if we divide it 1 by 4 =0.25
then 1 by 8=0.125

so as we can see here 1/8 is bigger, but which is more precise?
1/4 is more precise!

Hope I've helped someone?!

Happy Fractions! ☺

Fractions

2009-04-10T19:18:00.007-05:00

This week, we began our new topic: fractions. During math skills, we were asked to compare fractions. There are two ways to compare; by using pictures and decimals. By comparing fractions with pictures, you are able to see the amount of pieces and which represents the numerator. When you compare fractions with decimals, you compare them by using the place values. For example, compare 2/3 and 4/6.

Decimal:

In order to get the decimal from the fraction, you divide the numerator by the denominator. If you divide 2 by 3, you will get 0.666667. If you divide 4 by 6, the answer will also be 0.666667. It's the same, so the fractions are equivalent.

Picture:

Clearly, 2/3 and 4/6 are equal. But they're not the same. For example, if you were to have 3 friends over at your house, and you wanted to eat pie. You cut the pie into sixths, and you take 4 pieces for you and your friends. Your mother comes into the kitchen and says, "2/3 of the pie is gone, who ate the pie?" You would've said, "No mom, my friends and I ate 4/6 of the pie." They're not the same because 4/6 would've been more precise.

Another example is 1/8 and 1/4; are they less than, greater than, or equal to? Let's find out.

Decimal:

Again, divide the numerator by the denominator. If you divide 1 by 8, you will get 0.125. If you divide 1 by 4, the answer will be 0.25. But which is more? Like I said in the beginning, you find out by comparing the place values.

As you can see, 1/8 is less than 1/4, because 1/4's tenth and hundredth places are bigger than 1/8's tenth and hundredth places. The extra 0's do not affect the decimal, it's there to be more precise.

Picture:

As you can see, 1/4 is obviously greater than 1/8. Both fractions have 1 as a numerator, which is very helpful when it comes to comparing fractions as well as ordering them. When 1 is the numerator, the fraction is called units. It's easier to compare and order them because the smaller the denominator is, the bigger the fraction. So, 4 being a denominator is bigger than 8 being a denominator.

Skills Assignment

2009-04-08T21:01:00.013-05:00

Skills

We are doing a new unit on Fractions!
For our assignment, we must explain in 2 different ways for 2 pairs of fractions. We have to show if there are the same, bigger, or smaller. The first fractions are two thirds and four sixths. Two thirds and four sixths are actually the same. If you simplified four sixths it would equal two thirds, they are equivalent fractions. If you punched them into your calculator you would get 0.6666667 repeating for them both. But they are different in a way, for example if you said you had to run two thirds of a kilometer but I said you had to run four sixths of a kilometer. I would be saying the same thing but I would be more precise, more accurate.

Okay, our last fractions are one eighth and one fourth. Which one is bigger, smaller, or equal?

One fourth is bigger! To prove this we can draw a picture showing the size or in this way. For example you are ordering a pizza from Pizza Hut and you got two pizzas of the small size, shape, toppings, THERE THE SAME IN EVERY WAY. Okay, the first pizza is cut up into eighths and the second one is cut into fourths. Now you can choose what pizza you what, would you want one fourths of a pizza or one eighths of one. I hoped you picked one fourths of one because its bigger unless your like me and your not hungry.

Skills Homework!

2009-04-08T17:37:00.005-05:00

This is a homework for Skills, Mr.Herbeck told us to find the difference between to fractions. There are 2 questions and I'll show you which one is bigger and why is it bigger.
They are 2/3 or 4/6
and 1/8 or 1/4

Lets start with 2/3 or 4/6.
Which one is Bigger?
Picture

Hmm....Their both the same. But which would you rather say? 4/6 or 2/3?
I think you would rather say 4/6 because it is more accurate. Why? because if you change the fraction into the decimal. 2/3 would be 0.666667 and 4/6 would be 0.66666667.
Wow its still the same? Well I think you should say 4/6 because its really accurate and most people will say 4/6 instead of 2/3. I bet you 100%!

On to the last one. which is 1/8 and 1/4
Picture:

Hmm..1/4 is bigger than 1/8? why is that? It's because the Bottom number is the whole number and the top number is the prices, and so pretend its a pizza? What would you rather it to yourself? 1/8 or 1/4?
You would pick 1/4 because it is bigger than 1/8!!

Challenge Picture

2009-03-20T21:09:00.000-05:00

Hey Everyone, Hopefully this helps out a bit!!

Challenge!!!

2009-03-18T12:39:00.001-05:00

Hey Everyone! I'm not sure if Mr. H want's me to write here, {please let me know if this is bad haha} but my name is Chantelle and I am going to the U of Regina and have been invited to your Blog!!!

I came across a question in one of my math classes that I feel will be right up your alley with Pythagorean Theorem! So here is a little challenge for you!

The question is: The perimeter of an isosceles triangle {2 sides are equal and the two angles at the base are equal} ABC with AB=BC is 128 inches. The altitude {height of the triangle which is perpendicular (90 degree angle) to the base ( and in the case of an isosceles triangle, hits at the midpoint of the base)} BD is 48 inches. What is the area of the triangle??

So, you will need a couple formulas other than just pythagorus. However, I think you can do it!
This is from my Math 308 class, which is a 4th year math class!!!

Good Luck!!

Scibe for Tuesday March 10th By Kim Ramirez 8-17

2009-03-10T22:02:00.006-05:00

Today in class Mr. Harbeck talked with us about perfect squares. He showed us how to take two or more perfect squares and turn it into one perfect square. Some homework was assigned to us and the homework is we have to make perfect squares rangeing from squares numbering from 1-16. Here is something that will help

Scribe Post

2009-03-09T20:13:00.005-05:00

Today in class we work on squares. And we copied down a times table that was 12x12.It looked something like this.

For homework we had to high light or colour the equal squares.But once we finished that it looked like this.

Also in class we had to answer the following:
1x1=1 16x16=
2x2=4 17x17=
3x3=9 18x18=
4x4=16 19x19=
5x5=25 20x20=
6x6=36 21x21=
7x7= 22x22=
8x8= 23x23=
8x9= 24x24=
10x10= 25x25=
11x11= 26x26=
12x12=144 27x27
13x13= 28x28
14x14= 29x29
15x15= 30x30=
Sorry it wasnt finished =(