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Estimating Sums
Estimating Differences
100
Estimate the sum of 7.4 + 3.7
What is 7+4=11
100
Estimate the difference of 8.2 - 5.4 =
What is 8 - 5 = 3
200
Estimate the sum of 17.97 + 6.80
What is 18 + 7 =25
200
Estimate the difference of 12.07 - 7.23 =
What is 12 - 7 = 5
300
Estimate the sum of 29.29 + 42.52 =
What is 29 + 43 = 72
300
Estimate the difference of 24.50 - 11.78 =
What is 25 - 12 = 13
400
Estimate the sum of 54.07 + 26.14 =
What is 54 + 26 = 80
400
Estimate the difference of 15.06 - 4.6 =
What is 15 - 5 = 10