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

Tuesday, April 28, 2009
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.