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Grade 1 · Math · On Level

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 · On-level practice · 14 questions · Version PG-L3Z5DQ-IB6W

Free printable
1.5 - 5 =
2.19 - 3 =
3.2 - 2 =
4.1 - 1 =
5.10 - 0 =
6.12 - 2 =
7.1 - 0 =
8.10 - 7 =
9.4 - 1 =
10.13 - 4 =
11.16 - 8 =
12.9 - 6 =
13.10 - 4 =
14.15 - 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 9
  1. 5 - 5 =0
  2. 19 - 3 =16
  3. 2 - 2 =0
  4. 1 - 1 =0
  5. 10 - 0 =10
  6. 12 - 2 =10
  7. 1 - 0 =1
  8. 10 - 7 =3
  9. 4 - 1 =3
  10. 13 - 4 =9
  11. 16 - 8 =8
  12. 9 - 6 =3
  13. 10 - 4 =6
  14. 15 - 13 =2

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.