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4th grade estimating sums, differences and products worksheets

Your child rounds numbers to the nearest hundred or thousand and picks the best estimate of a sum, difference or product.

Common Core 4.OA.A.3 (Operations and Algebraic Thinking)

Sample problems

  1. Sample 1Round each number to the nearest hundred. Which is the best estimate of 134 + 790?
    A. 924
    B. 900
    C. 1,000
    D. 800

    Answer: B

  2. Sample 2Round each number to the nearest hundred. Which is the best estimate of 544 + 489?
    A. 900
    B. 1,100
    C. 1,033
    D. 1,000

    Answer: D

  3. A bit harderRound each number to the nearest hundred. Which is the best estimate of 2,966 + 9,933?
    A. 12,899
    B. 12,900
    C. 12,800
    D. 13,000

    Answer: B

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Estimating sums, differences and products