Estimate Sums for 4th Grade
Estimating sums gives students a quick way to check whether an addition answer is reasonable before or after finding the exact total. This lesson covers estimating sums and...
Estimating Sums
To estimate a sum, round each number to the same place value and add the rounded numbers. Rounding to a larger place is quicker but less accurate, which is the trade-off every estimate makes. The examples below work through both, with practice problems and answers.