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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 9

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-74LF8G-1PAM

Free printable
1.7 - 5 =
2.4 - 0 =
3.1 - 0 =
4.6 - 5 =
5.17 - 12 =
6.18 - 9 =
7.15 - 0 =
8.11 - 5 =
9.2 - 2 =
10.12 - 11 =
11.17 - 16 =
12.9 - 0 =
13.6 - 3 =
14.18 - 7 =
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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 9
  1. 7 - 5 =2
  2. 4 - 0 =4
  3. 1 - 0 =1
  4. 6 - 5 =1
  5. 17 - 12 =5
  6. 18 - 9 =9
  7. 15 - 0 =15
  8. 11 - 5 =6
  9. 2 - 2 =0
  10. 12 - 11 =1
  11. 17 - 16 =1
  12. 9 - 0 =9
  13. 6 - 3 =3
  14. 18 - 7 =11

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.