Missing addend worksheets

  • Level: Grade 1 – Grade 2
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  • Answer key included

Missing addend problems connect addition and subtraction and are an early form of algebra: 7 + ? = 12 is the same question as 12 − 7.

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Missing addend worksheets
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Write the missing number.

  1. 1.
    2 + = 13
  2. 2.
    + 2 = 12
  3. 3.
    + 0 = 18
  4. 4.
    17 + = 20
  5. 5.
    2 + = 8
  6. 6.
    + 2 = 18
  7. 7.
    10 + = 12
  8. 8.
    + 6 = 18
  9. 9.
    + 6 = 15
  10. 10.
    11 + = 17
  11. 11.
    + 9 = 17
  12. 12.
    5 + = 12
  13. 13.
    + 6 = 8
  14. 14.
    6 + = 13
  15. 15.
    + 0 = 20
  16. 16.
    20 + = 20
  17. 17.
    + 1 = 18
  18. 18.
    + 3 = 17
  19. 19.
    + 0 = 14
  20. 20.
    + 1 = 17
  21. 21.
    7 + = 9
  22. 22.
    + 6 = 11
  23. 23.
    14 + = 15
  24. 24.
    + 1 = 11
MathSheetLabWorksheet #290915
Missing addend worksheets Answer key
  1. 1.
    2 + 11 = 13
  2. 2.
    10 + 2 = 12
  3. 3.
    18 + 0 = 18
  4. 4.
    17 + 3 = 20
  5. 5.
    2 + 6 = 8
  6. 6.
    16 + 2 = 18
  7. 7.
    10 + 2 = 12
  8. 8.
    12 + 6 = 18
  9. 9.
    9 + 6 = 15
  10. 10.
    11 + 6 = 17
  11. 11.
    8 + 9 = 17
  12. 12.
    5 + 7 = 12
  13. 13.
    2 + 6 = 8
  14. 14.
    6 + 7 = 13
  15. 15.
    20 + 0 = 20
  16. 16.
    20 + 0 = 20
  17. 17.
    17 + 1 = 18
  18. 18.
    14 + 3 = 17
  19. 19.
    14 + 0 = 14
  20. 20.
    16 + 1 = 17
  21. 21.
    7 + 2 = 9
  22. 22.
    5 + 6 = 11
  23. 23.
    14 + 1 = 15
  24. 24.
    10 + 1 = 11
MathSheetLabWorksheet #290915

About this worksheet

Each sheet contains 15, 24 or 30 problems (your choice) and is generated at random. Press “New problems” as many times as you like; there is no limit and no account needed.

Worked example

8 + = 9
  1. The missing number is the total minus the number you know: 9 − 8 = 1.
  2. Check: 8 + 1 = 9.

Answer: 1

Teaching tips

  • Encourage counting on from the known addend to the total.

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