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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 17

Build subtraction fluency with numbers through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.

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Subtraction Within 20

Grade 1 · On-level practice · 14 questions · Version PG-Z43IBN-IB6W

Free printable
1.3 - 2 =
2.19 - 6 =
3.4 - 4 =
4.15 - 15 =
5.13 - 7 =
6.12 - 3 =
7.16 - 9 =
8.9 - 6 =
9.10 - 2 =
10.8 - 8 =
11.14 - 7 =
12.18 - 4 =
13.17 - 3 =
14.6 - 0 =
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Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 17
  1. 3 - 2 =1
  2. 19 - 6 =13
  3. 4 - 4 =0
  4. 15 - 15 =0
  5. 13 - 7 =6
  6. 12 - 3 =9
  7. 16 - 9 =7
  8. 9 - 6 =3
  9. 10 - 2 =8
  10. 8 - 8 =0
  11. 14 - 7 =7
  12. 18 - 4 =14
  13. 17 - 3 =14
  14. 6 - 0 =6

Worked example

16 - 7 = 9. Break 7 into 6 and 1: 16 - 6 - 1 = 9.

Common mistake

Switching the order of the numbers because subtraction is not commutative.

Helpful hint

Count back to 10, then subtract what remains.