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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 4

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-AQG993-1PAM

Free printable
1.9 - 7 =
2.20 - 15 =
3.5 - 2 =
4.14 - 2 =
5.12 - 7 =
6.4 - 2 =
7.3 - 2 =
8.20 - 5 =
9.5 - 0 =
10.13 - 8 =
11.15 - 14 =
12.14 - 9 =
13.16 - 12 =
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 4
  1. 9 - 7 =2
  2. 20 - 15 =5
  3. 5 - 2 =3
  4. 14 - 2 =12
  5. 12 - 7 =5
  6. 4 - 2 =2
  7. 3 - 2 =1
  8. 20 - 5 =15
  9. 5 - 0 =5
  10. 13 - 8 =5
  11. 15 - 14 =1
  12. 14 - 9 =5
  13. 16 - 12 =4
  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.