Decimal Review

Rounding

100

Round to the nearest tenth. 

5.4599 

5.5 

200

Round to the nearest hundredth. 

8.4426

8.44

300

Round to the nearest thousandth. 

10.04162 

10.042 

400

Round each number to the nearest tenth. Then estimate/add the sum. 

11.73 + 9.28 = 

21

500

Round each number to the nearest tenth. Then estimate the difference. 

18.24 - 7.92 = 

10.3 

Multiplying Decimals

100

Multiply 12.7 by 7

12.7 x 7 = 88.9

200

Multiply 15.6 by 8  

15.6 x 8 = 124.8

300

Multiply 56.41 by 4 

56.41 x 4 = 225.64

400

Multiply 26.45 by 9  

26.45 x 9 = 238.05 

500

Multiply 23.107 by 6 

23.107 x 6 = 138.642

Dividing Decimals

100

Divide 0.96 by 3 

0.96 ÷ 3 = 0.32

200

Divide 0.9 by 2

0.9 ÷ 2 = 0.45

300

Divide 7.75 by 5

7.75 ÷ 5 = 1.55

400

$ 64.75 ÷ 7 = ________

$ 64.75 ÷ 7 = $ 9.25 

500

Divide 45.22 by 20

45.22 ÷ 20 = 2.261

Multiplying by powers of 10, 100, or 1,000)

100

12.96 x 1,000 = ________

12.96 x 1,000 = 12,960

200

22.9 x 30 = ________

22.9 x 30 = 687

300

0.125 x 10³ = _________

0.125 x 1,000 = 125

400

16.4 x 400 = ________

16.4 x 400 = 6,560

500

0.06 x ______ = 60

1,000

0.06 x 1,000 = 60

Dividing by powers of 10, 100, or 1,000)

100

2,329 ÷ 100 = ______ 

2,329 ÷ 100 = 23.29

200

448 ÷ 200 = _______

448 ÷ 200 = 2.24

300

75 ÷ 5,000 = ________

75 ÷ 5,000 = 0.015

400

667.1 ÷ ______ = 66.71

667.1 ÷ 10 = 66.71 

500

13 ÷  ______ = 0.13

13 ÷ 100 = 0.13