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Estimating Sums and Differences

Estimating Sums and Differences. Estimate A number close to an exact value. An estimate indicates “ABOUT HOW MUCH.” Compatible numbers-Numbers in a problem that ar e easily to work with mentally. When estimating, round to the highest place value of the smaller number.

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Estimating Sums and Differences

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  1. Estimating Sums and Differences

  2. Estimate A number close to an exact value. An estimate indicates “ABOUT HOW MUCH.” Compatible numbers-Numbers in a problem that are easily to work with mentally. When estimating, round to the highest place value of the smaller number. KEY WORDS ESTIMATE=ABOUT

  3. Cut and paste for journals

  4. Let’s practice!

  5. Practice with your partner

  6. Examples: Round to the nearest ? 456 1,554 + 48 + 623

  7. 258 7,258 + 62 - 145 Round to the nearest ? 368 9,852 + 41 - 741

  8. Estimating Round to the nearest 10/use the last two digits. Round to the nearest 100, use the last three digits. Round to the nearest 1000, use the last four digits. hundreds thousands tens ones 15,528 15,528 15,530 15,528 15,500 15,528 16,500

  9. Rounding Round Up

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