Grade 4 · Math · Lesson 4

Estimate in Real-Life Situations

Estimation means finding an answer that is close enough to the exact value for the purpose at hand. We use estimation when shopping, measuring, planning trips, or checking whether a calculation makes sense. Three main strategies help us estimate quickly and accurately.

What this lesson teaches

1Define estimation and explain when it is useful
2Round numbers to estimate sums, differences, products, and quotients
3Choose the best estimation strategy for a real-life situation
4Evaluate whether an estimate is reasonable for a given context

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