Question

Use any estimation strategy to calculate. 51.12 × 87.906

Answer 1

51x88= 4488

51.12 = 51

87.906 = 88

Answer 2

Round 51.12 to 50.
Round 87 to 90

Use your multiplication facts to do 50x90
5•9=45
Add two zeros behind 45 since 50 and 90 have two zeros combined

The answer should be near 4500 then.

The actual answer for this equation is 4,493.75472.

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