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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 7

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-B0FUY2-1PAM

Free printable
1.17 - 13 =
2.8 - 0 =
3.3 - 0 =
4.11 - 11 =
5.11 - 2 =
6.18 - 6 =
7.11 - 1 =
8.2 - 2 =
9.16 - 14 =
10.7 - 3 =
11.12 - 7 =
12.15 - 15 =
13.9 - 3 =
14.18 - 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 7
  1. 17 - 13 =4
  2. 8 - 0 =8
  3. 3 - 0 =3
  4. 11 - 11 =0
  5. 11 - 2 =9
  6. 18 - 6 =12
  7. 11 - 1 =10
  8. 2 - 2 =0
  9. 16 - 14 =2
  10. 7 - 3 =4
  11. 12 - 7 =5
  12. 15 - 15 =0
  13. 9 - 3 =6
  14. 18 - 10 =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.