#
PRE-ALGEBRALesson 6 of 171

ADDITION AND SUBTRACTION

Estimating Sums and Differences

Students learn to estimate a sum or difference by first rounding each number to the place specified in the problem. For example, to estimate 4,909 + 3,217 by rounding each number to the nearest thousand, first round 4,909 up to 5,000, and round 3,217 down to 3,000, then add 5,000 + 3,000 more...

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*Also referred to as Elementary Algebra or Beginning Algebra.

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