Question

Estimate the sum of 9.327 + 5.72 + 4.132 to one decimal place.

Answer 1

The sum of those numbers is 19.179 not 18.729. However, the Estimation of the amount and the answer for this question is 19.2 because the decimal place you are finding has a number to its right that is greater to that decimal place, so you add the one to the decimal place you are observing.

Answer 2

19.2 is the answer. you add them all up then estimate to find the right answer.