Unit 7

Multiplying Fractions

100

1/4 x 1/5

1/20

200

2/3 x 1/4 

2/ 12 or 1/6

300

3/4 x 2/5

6/20 or 3/10

400

6/7 x 5/6

30/ 42 or 5/7

Dividing

100

3 / 963

321

200

888 / 24

37

300

Ms. Hall's class is planning a water balloon fight. They found 2,498 balloons in the cupboard. How many water balloons will each of her 28 students get if they share them equally 

2,498 / 28 = 89 r 6 

400

The 789 students at Brown Elementary are going on a field trip. Each bus holds 32 students. How many buses do they need?

789 / 32 = 24 r 21

24 buses will have 32 students and 1 bus will have 21 students 

Power of ten

100

0.29 x 100

29

200

32.7 / 10

3.27

300

Multiply each whole number or decimal by the powers of 10. For example 42 x 10³ = 42 x (10x10x10) = 42000

79 x 10⁴

79 x (10x10x10x10) = 790,000

400

Multiply each whole number or decimal by the powers of 10. For example 42 x 10³ = 42 x (10x10x10) = 42000

0.06 x 10⁵

0.06 x (10x10x10x10x10)= 6,000

Dividing Fractions

100

If it takes 1/5 of a can to paint one wall, how many walls can you paint with 2 cans?

2 / 1/5 = 10

200

There is 1/4 of a cake for four friends to share. If they cut the 1/4 of the cake into equal slices, how much of the original cake did each friend get?

1/4 / 4 = 1/16

300

6/ 1/3

27

400

1/5 / 3

1/ 15