Question

Explain how estimation helps you place the decimal point when multiplying 3.9 times 5.3

Answer 1

Or you could just count how many time the decimal is move like in the 3.9 the decimal I move once the same goes for the other so you would move the decimal twice

Answer 2

When you estimate, you round the decimal up. 3.9 rounds up to 4. 5.3 rounds up to 5.

4 times 5 equals 20.The actual answer is 20.67.