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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 19

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 · On-level practice · 14 questions · Version PG-12ZXY19-IB6W

Free printable
1.5 - 3 =
2.15 - 4 =
3.7 - 4 =
4.15 - 14 =
5.9 - 4 =
6.12 - 0 =
7.17 - 1 =
8.8 - 2 =
9.15 - 10 =
10.18 - 4 =
11.16 - 6 =
12.2 - 0 =
13.7 - 0 =
14.15 - 11 =
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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 19
  1. 5 - 3 =2
  2. 15 - 4 =11
  3. 7 - 4 =3
  4. 15 - 14 =1
  5. 9 - 4 =5
  6. 12 - 0 =12
  7. 17 - 1 =16
  8. 8 - 2 =6
  9. 15 - 10 =5
  10. 18 - 4 =14
  11. 16 - 6 =10
  12. 2 - 0 =2
  13. 7 - 0 =7
  14. 15 - 11 =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.