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First estimate and then calculate the answers.

A. 2^2+3^3-1^3
B. 5^3-4^3+3^3
C. 4^2+4^3+2^2

1 answer

A. 2^2+3^3-1^3
Estimated: 4 + 27 - 1 = 30
Calculated: 4 + 27 - 1 = 30

B. 5^3-4^3+3^3
Estimated: 125 - 64 + 27 = 88
Calculated: 125 - 64 + 27 = 88

C. 4^2+4^3+2^2
Estimated: 16 + 64 + 4 = 84
Calculated: 16 + 64 + 4 = 84