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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 2

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-A6H1V5-1PAM

Free printable
1.3 - 3 =
2.15 - 7 =
3.9 - 3 =
4.20 - 3 =
5.13 - 6 =
6.8 - 6 =
7.20 - 7 =
8.5 - 2 =
9.3 - 0 =
10.13 - 4 =
11.11 - 2 =
12.19 - 19 =
13.10 - 3 =
14.14 - 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 2
  1. 3 - 3 =0
  2. 15 - 7 =8
  3. 9 - 3 =6
  4. 20 - 3 =17
  5. 13 - 6 =7
  6. 8 - 6 =2
  7. 20 - 7 =13
  8. 5 - 2 =3
  9. 3 - 0 =3
  10. 13 - 4 =9
  11. 11 - 2 =9
  12. 19 - 19 =0
  13. 10 - 3 =7
  14. 14 - 10 =4

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.