Subtraction within 20 worksheets

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

These worksheets cover every subtraction fact with numbers up to 20. Fluency within 20 is expected by the end of second grade in many curricula.

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Subtraction within 20 worksheets
Name: Date: Score: / 40

Subtract.

  1. 1.
    7 − 2 =
  2. 2.
    18 − 10 =
  3. 3.
    12 − 5 =
  4. 4.
    17 − 5 =
  5. 5.
    18 − 0 =
  6. 6.
    2 − 0 =
  7. 7.
    20 − 18 =
  8. 8.
    8 − 8 =
  9. 9.
    17 − 13 =
  10. 10.
    9 − 8 =
  11. 11.
    16 − 9 =
  12. 12.
    2 − 1 =
  13. 13.
    15 − 13 =
  14. 14.
    5 − 0 =
  15. 15.
    15 − 9 =
  16. 16.
    9 − 3 =
  17. 17.
    6 − 3 =
  18. 18.
    14 − 2 =
  19. 19.
    9 − 6 =
  20. 20.
    5 − 5 =
  21. 21.
    13 − 11 =
  22. 22.
    16 − 2 =
  23. 23.
    1 − 1 =
  24. 24.
    7 − 0 =
  25. 25.
    16 − 10 =
  26. 26.
    20 − 19 =
  27. 27.
    3 − 2 =
  28. 28.
    16 − 13 =
  29. 29.
    14 − 10 =
  30. 30.
    9 − 7 =
  31. 31.
    14 − 5 =
  32. 32.
    5 − 4 =
  33. 33.
    4 − 0 =
  34. 34.
    6 − 6 =
  35. 35.
    7 − 7 =
  36. 36.
    4 − 2 =
  37. 37.
    20 − 2 =
  38. 38.
    19 − 16 =
  39. 39.
    15 − 14 =
  40. 40.
    5 − 2 =
MathSheetLabWorksheet #372760
Subtraction within 20 worksheets Answer key
  1. 1.
    7 − 2 = 5
  2. 2.
    18 − 10 = 8
  3. 3.
    12 − 5 = 7
  4. 4.
    17 − 5 = 12
  5. 5.
    18 − 0 = 18
  6. 6.
    2 − 0 = 2
  7. 7.
    20 − 18 = 2
  8. 8.
    8 − 8 = 0
  9. 9.
    17 − 13 = 4
  10. 10.
    9 − 8 = 1
  11. 11.
    16 − 9 = 7
  12. 12.
    2 − 1 = 1
  13. 13.
    15 − 13 = 2
  14. 14.
    5 − 0 = 5
  15. 15.
    15 − 9 = 6
  16. 16.
    9 − 3 = 6
  17. 17.
    6 − 3 = 3
  18. 18.
    14 − 2 = 12
  19. 19.
    9 − 6 = 3
  20. 20.
    5 − 5 = 0
  21. 21.
    13 − 11 = 2
  22. 22.
    16 − 2 = 14
  23. 23.
    1 − 1 = 0
  24. 24.
    7 − 0 = 7
  25. 25.
    16 − 10 = 6
  26. 26.
    20 − 19 = 1
  27. 27.
    3 − 2 = 1
  28. 28.
    16 − 13 = 3
  29. 29.
    14 − 10 = 4
  30. 30.
    9 − 7 = 2
  31. 31.
    14 − 5 = 9
  32. 32.
    5 − 4 = 1
  33. 33.
    4 − 0 = 4
  34. 34.
    6 − 6 = 0
  35. 35.
    7 − 7 = 0
  36. 36.
    4 − 2 = 2
  37. 37.
    20 − 2 = 18
  38. 38.
    19 − 16 = 3
  39. 39.
    15 − 14 = 1
  40. 40.
    5 − 2 = 3
MathSheetLabWorksheet #372760

About this worksheet

Problems are horizontal, which encourages strategies such as subtracting through ten (15 − 7 = 15 − 5 − 2).

Each sheet contains 20, 30, 40 or 50 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

10 − 10 =
  1. Think addition: 10 + ? = 10.
  2. 10 + 0 = 10, so 10 − 10 = 0.

Answer: 0

Teaching tips

  • Practice "subtract through ten" with a number line.
  • Pair this sheet with addition within 20 on alternate days.

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