Question

Explain how an estimate helps you place the decimal point when multiplying 3.7×5.1

Answer 1

3.7 estimates 4. 5.1 estimate to 5  so 4*5 =20.

Answer 2

If you estimated 3.7 to 4 and 5.1 to 5 the answer would be 20. You would have 20 and now you can think is 20 a reasonable answer for 3.7x5.1. The answer for 3.7x5.1=18.87, so the answer is yes.

Hope that helped:)