Estimating/Rounding
Multiplying Decimals
Dividing Decimals
Powers of 10
100

Round to the nearest whole number:

10.12

10

100

1.5 x 3 =

4.5

100

8.2 / 2 =

4.1

100

3.5 x 10 =

35

200

Round to the nearest tenth

156.369

156.4

200

4.26 x 4 =

17.04

200

.55 / 11 =

0.05

200

0.56 x 1000 =

560

300

Round to the nearest tenth

0.149

0.1

300

12.5 x 0.13 =

1.625

300

96 / 0.3 =

320

300

8.1 x 10=

8100

400

Round to the nearest hundredth

1,156,257.1559

1,156,257.16

400

0.15 x 14.9 =

2.235

400

48 / .08 =

600

400

49 / 102 =

0.49

500

Round to the nearest thousand

1,589,456.159

1,589,000

500

1.55 x 37.2

57.66

500

1.2 / 0.4 = 

3

500

1.2 / 105 = 

0.000012