Question

How is estimation helpful when dividing multi-digit numbers.

Answer 1

Because it's less work, anything to save time. No one wants to write out full number for pi

Answer 2

Estimating or Rounding is a very useful tool to divide multi-digit numbers, because it save us time doing a math operation and can work with whole numbers.

Step-by-step explanation:

For this operation or procedure there is an existant rule that can be easily understood. When the number at the right of a digit is less than 5 we round down and when the number is grater than 5 we round up. For example: 5.4 (Round down to 5), 9.6 (Round up to 10)