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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 7

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-JG1J7W-IB6W

Free printable
1.20 - 8 =
2.10 - 1 =
3.7 - 0 =
4.19 - 15 =
5.6 - 1 =
6.7 - 3 =
7.9 - 2 =
8.13 - 5 =
9.17 - 13 =
10.11 - 8 =
11.10 - 2 =
12.12 - 10 =
13.5 - 0 =
14.11 - 10 =
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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 7
  1. 20 - 8 =12
  2. 10 - 1 =9
  3. 7 - 0 =7
  4. 19 - 15 =4
  5. 6 - 1 =5
  6. 7 - 3 =4
  7. 9 - 2 =7
  8. 13 - 5 =8
  9. 17 - 13 =4
  10. 11 - 8 =3
  11. 10 - 2 =8
  12. 12 - 10 =2
  13. 5 - 0 =5
  14. 11 - 10 =1

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.