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.

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