Unit 5:Decimal Operations

Adding Decimals

100

13.74+105.24=

118.98

200

622.78+129.32=

752.1

300

190.86+12.56=

203.42

400

1,245.6+12,456.22=

13,701.82

500

133,478.98+100,321.55=

233,800.53

Subtracting Decimals

100

218.92-17.6=

201.32

200

64.38-17.6=

46.78

300

200.1-165.68=

34.42

400

1.00-0.15=

0.85 

500

187.43-12.23=

175.20

Multiplying Decimals

100

1.68x0.9=

1.512

200

999.98x37=

36,999.26

300

38x0.55=

20.90

400

154.32x67=

10,339.44

500

285x0.17=

48.45

Dividing Decimals

100

3/0.1=

30

200

0.9/4=

0.225 or 9/40

300

683/0.02=

68,300/2 or 34,150

400

6/0.01=

600

500

7/0.1=

70

Rounding

100

Round 13.788 to the nearest hundredths

13.79

200

Round 1.82 to the nearest tenths

1.8

300

Round 15.675 to the nearest tenths

15.7

400

Round 1.899 to the nearest whole number 

2.0 or 2

500

Round 1.78945368 to the nearest thousandth 

1.789