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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 5

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-AGGNK4-1PAM

Free printable
1.8 - 7 =
2.6 - 3 =
3.13 - 8 =
4.10 - 4 =
5.11 - 7 =
6.15 - 8 =
7.12 - 5 =
8.18 - 1 =
9.20 - 4 =
10.7 - 2 =
11.12 - 9 =
12.14 - 9 =
13.4 - 2 =
14.16 - 2 =
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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 5
  1. 8 - 7 =1
  2. 6 - 3 =3
  3. 13 - 8 =5
  4. 10 - 4 =6
  5. 11 - 7 =4
  6. 15 - 8 =7
  7. 12 - 5 =7
  8. 18 - 1 =17
  9. 20 - 4 =16
  10. 7 - 2 =5
  11. 12 - 9 =3
  12. 14 - 9 =5
  13. 4 - 2 =2
  14. 16 - 2 =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.