MathematiCat

1st grade missing numbers in addition and subtraction worksheets

Your child finds the number that belongs in the blank, as in 5 + __ = 12 or __ − 3 = 7, by thinking about how addition and subtraction are linked.

Common Core 1.OA.D.8 (Operations and Algebraic Thinking)

Sample problems

  1. Sample 13 + ? = 4

    Answer: 1

  2. Sample 26 + ? = 7

    Answer: 1

  3. A bit harder9 − ? = 6

    Answer: 3

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Missing numbers in addition and subtraction