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5th grade estimating with decimals worksheets

Your child rounds decimals to the nearest whole number and picks the best estimate of a sum, difference or product, including totals and differences from short stories.

Common Core 5.NBT.A.4 (Number and Operations in Base Ten)

Sample problems

  1. Sample 1A farm's large tank holds 261.7 gallons of water and its small tank holds 239.1 gallons. About how many more gallons does the large tank hold than the small tank?
    A. 500 gallons
    B. 10 gallons
    C. 30 gallons
    D. 20 gallons

    Answer: D

  2. Sample 2Round each number to the nearest whole number. Which is the best estimate of 3.8 + 4.1?
    A. 8
    B. 9
    C. 7.9
    D. 7

    Answer: A

  3. A bit harderRound each number to the nearest whole number. Which is the best estimate of 6.62 × 7.21?
    A. 47.7302
    B. 49
    C. 56
    D. 42

    Answer: B

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Estimating with decimals