Showing posts with label fractionpost. Show all posts
Showing posts with label fractionpost. Show all posts
Sharmayne's Last Post
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
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
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.
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
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.
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.
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
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
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
HI! Mr. Harbeck told us to do a review post about adding, subtraction, multiplying and dividing proper, improper and mixed fractions.
Liem's Last Fraction Post
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!
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!
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!
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