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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 3

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-IC34G0-IB6W

Free printable
1.12 - 5 =
2.12 - 2 =
3.13 - 9 =
4.15 - 0 =
5.5 - 5 =
6.7 - 7 =
7.13 - 1 =
8.7 - 2 =
9.1 - 1 =
10.10 - 2 =
11.6 - 3 =
12.1 - 0 =
13.18 - 6 =
14.17 - 3 =
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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 3
  1. 12 - 5 =7
  2. 12 - 2 =10
  3. 13 - 9 =4
  4. 15 - 0 =15
  5. 5 - 5 =0
  6. 7 - 7 =0
  7. 13 - 1 =12
  8. 7 - 2 =5
  9. 1 - 1 =0
  10. 10 - 2 =8
  11. 6 - 3 =3
  12. 1 - 0 =1
  13. 18 - 6 =12
  14. 17 - 3 =14

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.