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Grade 1 · Math · Building Confidence

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 · Building confidence · 14 questions · Version PG-9WHG66-1PAM

Free printable
1.13 - 6 =
2.17 - 15 =
3.20 - 5 =
4.6 - 5 =
5.3 - 1 =
6.1 - 1 =
7.3 - 3 =
8.17 - 14 =
9.13 - 3 =
10.17 - 7 =
11.9 - 9 =
12.19 - 0 =
13.12 - 2 =
14.8 - 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 3
  1. 13 - 6 =7
  2. 17 - 15 =2
  3. 20 - 5 =15
  4. 6 - 5 =1
  5. 3 - 1 =2
  6. 1 - 1 =0
  7. 3 - 3 =0
  8. 17 - 14 =3
  9. 13 - 3 =10
  10. 17 - 7 =10
  11. 9 - 9 =0
  12. 19 - 0 =19
  13. 12 - 2 =10
  14. 8 - 0 =8

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.