Adding & Subtracting Decimals

Adding Decimals

100

1.1 + 1.2

2.3

200

32.35 + 29.9

62.25

300

24 + 1.456

25.456

Rounding Decimals

100

Round the decimal to the given place value. 27.35; tenths

27.4

200

Round the decimal to the given place-value. 2.059; whole number

2

300

Round the decimal to the given place-value. 3.4553; thousandths

3.455

Estimating Sums& Differences

100

Estimate 31.29 + 58.07

31 + 58 = 89

200

Estimate 12.045 - 11.81

12 - 12 = 0

300

Estimate. 6.45 + 5.88 + 5.61 + 6.03

6 + 6 + 6 + 6 = 24

Subtracting Decimals

100

Subtract the decimals 5.9 - 3.4

2.5

200

Subtract the Decimals 1.325 - 0.081

1.244

300

Subtract the decimals 148.93 - 121.36

27.57