Answer:
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.
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)
