Subtract Decimals
Add
Decimals
Rounding Decimals
Estimating Sums
& Differences
Adding or Subtracting Decimals
100

What is 3.14 - 2.1

What is 1.04

100

What is 34.2 + 22.1

What is 56.3

100
Round the decimal to the given place-value. 5.031; hundredths
What is 5.03
100
Estimate using rounding. 38.23 + 11.84
What is 38 + 12 = 51
100
Add the decimals 43.28 + 31.45
What is 74.73
200

400.2 - 201.34

What is 198.86

200

42.3 + 21.367

What is 63.667

200
Round the decimal to the given place-value. 0.00042; ten-thousandths
What is 0.0004
200
Estimate using Rounding. 75.38 + 22.04
What is 75. + 22 = 97
200
Add the decimals 0.724 + 6.458
What is 7.182
300

45.99 - 23.35

What is 22.64

300

19.102 + 4.33

What is 23.432

300
Round the decimal to the given place-value. 27.35; tens
What is 27
300
Estimate using Front-End Estimation 31.29 + 58.07
What is 31. + 58 = 89
300
Add the Decimals 1.325 + 0.081
What is 1.406
400

What is 108.276 - 27.3

What is 80.976

400

What is 52.202 + 52.002

What is 104.204

400
Round the decimal to the given place-value. 3.4553; thousandths
What is 3.455
400
Estimate using clustering 12.045 + 11.81 + 12.3 + 11.56
What is 12. + 12. + 12. + 12. = 48
400
Subtract the decimals 148.93 - 121.36
What is 27.57
500

900.222- 900.002

What is 0.22

500

589.235 + 345.198

What is 934.433

500
Round the decimal to the given place-value. 2.059; hundredths
What is 2.06
500
Estimate using clustering. 6.45 + 5.88 + 5.61 + 6.03
What is 6 + 6 + 6 + 6 = 24
500
Subtract the decimals 248 - 131.48
What is 116.72
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