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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 1

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-9CI8S8-1PAM

Free printable
1.3 - 3 =
2.19 - 5 =
3.7 - 0 =
4.16 - 13 =
5.8 - 4 =
6.11 - 0 =
7.15 - 12 =
8.2 - 2 =
9.1 - 1 =
10.14 - 14 =
11.19 - 15 =
12.15 - 8 =
13.6 - 6 =
14.18 - 13 =
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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 1
  1. 3 - 3 =0
  2. 19 - 5 =14
  3. 7 - 0 =7
  4. 16 - 13 =3
  5. 8 - 4 =4
  6. 11 - 0 =11
  7. 15 - 12 =3
  8. 2 - 2 =0
  9. 1 - 1 =0
  10. 14 - 14 =0
  11. 19 - 15 =4
  12. 15 - 8 =7
  13. 6 - 6 =0
  14. 18 - 13 =5

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.