Decimals Decimals Decimals

add decimals

100

33.3 + 12.4

45.7

200

43.56 + 2.45 =

46.01

300

27.06 + 3.4

30.46

400

13.40 + 9.8

23.20

500

Ms. Cearns drove 11.3 km to the dentist, 7.5 km to the library, and 5.8 km back home. How far did he travel?

24.6 km

subtract decimals

100

46.5 - 22.3

24.2

200

56.2 - 35.8

20.4

300

13.40 - 9

4.4

400

46.5 - 3.46

43.04

500

If a 10-metre piece of electrical tape has 0.037 metres cut from it, then what is the new length of the tape?

9.963 metres

multiply decimals

100

3 x 0.5

1.5

200

2.45 x 9

22.05

300

36.45 x .02

0.729

400

0.26 x 2.5

0.65

500

0.18 x 30.6

5.508

rounding decimals

100

0.785 rounded to the nearest tenth

0.8

200

98.076 rounded to the nearest hundredth

98.08

300

176.8754 rounded to the nearest thousandth

176.875

400

8.998 rounded to the nearest tenth

9.0

500

98.67598 rounded to the nearest ten-thousandth

98.6760

powers of ten

100

8.5 divided by 10

.85

200

1.28 x 10²

128

300

9.969 divided by 100

0.09969

400

6.14 multiplied by 10⁴

61400

500

79.5 x 10,000

795,000