Estimating when adding multi-digit numbers
imp-addition-and-subtraction--estimate-to-add-multi-digit-numbers--estimating-adding-large-numbers-by-rounding
Addition, subtraction, and estimation
Estimate to add multi-digit numbers
Let's learn about estimating when adding multi-digit numbers. We see how to round numbers to the nearest 10 and then add them together to get an approximate sum. This technique is helpful for us when we need to make quick mental calculations and don't require an exact answer.