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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 14

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-ZE340M-IB6W

Free printable
1.12 - 10 =
2.16 - 0 =
3.1 - 1 =
4.12 - 6 =
5.13 - 1 =
6.7 - 0 =
7.2 - 2 =
8.5 - 3 =
9.11 - 8 =
10.7 - 7 =
11.14 - 2 =
12.12 - 0 =
13.17 - 0 =
14.4 - 1 =
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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 14
  1. 12 - 10 =2
  2. 16 - 0 =16
  3. 1 - 1 =0
  4. 12 - 6 =6
  5. 13 - 1 =12
  6. 7 - 0 =7
  7. 2 - 2 =0
  8. 5 - 3 =2
  9. 11 - 8 =3
  10. 7 - 7 =0
  11. 14 - 2 =12
  12. 12 - 0 =12
  13. 17 - 0 =17
  14. 4 - 1 =3

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.