Grade 4 · Math · Lesson 12

Estimate Products and Quotients

Estimating before you calculate helps you decide whether your answer makes sense. For multiplication, round one or both factors to a nearby ten or hundred. For division, choose a compatible number — one that divides evenly — close to the dividend.

What this lesson teaches

1Estimate multiplication products by rounding factors to the nearest ten or hundred
2Estimate division quotients using compatible numbers
3Determine whether an estimate is an overestimate or underestimate
4Use estimation to check the reasonableness of exact answers

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