Adding & Subtracting Decimals

Subtract Decimals

100

What is 3.14 - 2.1

What is 1.04

200

400.2 - 201.34

What is 198.86

300

45.99 - 23.35

What is 22.64

400

What is 108.276 - 27.3

What is 80.976

500

900.222- 900.002

What is 0.22

AddDecimals

100

What is 34.2 + 22.1

What is 56.3

200

42.3 + 21.367

What is 63.667

300

19.102 + 4.33

What is 23.432

400

What is 52.202 + 52.002

What is 104.204

500

589.235 + 345.198

What is 934.433

Rounding Decimals

100

Round the decimal to the given place-value. 5.031; hundredths

What is 5.03

200

Round the decimal to the given place-value. 0.00042; ten-thousandths

What is 0.0004

300

Round the decimal to the given place-value. 27.35; tens

What is 27

400

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

What is 3.455

500

Round the decimal to the given place-value. 2.059; hundredths

What is 2.06

Estimating Sums& Differences

100

Estimate using rounding. 38.23 + 11.84

What is 38 + 12 = 51

200

Estimate using Rounding. 75.38 + 22.04

What is 75. + 22 = 97

300

Estimate using Front-End Estimation 31.29 + 58.07

What is 31. + 58 = 89

400

Estimate using clustering 12.045 + 11.81 + 12.3 + 11.56

What is 12. + 12. + 12. + 12. = 48

500

Estimate using clustering. 6.45 + 5.88 + 5.61 + 6.03

What is 6 + 6 + 6 + 6 = 24

Adding or Subtracting Decimals

100

Add the decimals 43.28 + 31.45

What is 74.73

200

Add the decimals 0.724 + 6.458

What is 7.182

300

Add the Decimals 1.325 + 0.081

What is 1.406

400

Subtract the decimals 148.93 - 121.36

What is 27.57

500

Subtract the decimals 248 - 131.48

What is 116.72