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Grade 1 · Math · On Level

Free Subtraction Within 20 worksheet - version 8

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-LDYR2P-IB6W

Free printable
1.15 - 9 =
2.4 - 1 =
3.14 - 7 =
4.18 - 12 =
5.8 - 2 =
6.11 - 1 =
7.5 - 0 =
8.9 - 9 =
9.9 - 2 =
10.18 - 10 =
11.15 - 13 =
12.5 - 3 =
13.18 - 7 =
14.17 - 4 =
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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 8
  1. 15 - 9 =6
  2. 4 - 1 =3
  3. 14 - 7 =7
  4. 18 - 12 =6
  5. 8 - 2 =6
  6. 11 - 1 =10
  7. 5 - 0 =5
  8. 9 - 9 =0
  9. 9 - 2 =7
  10. 18 - 10 =8
  11. 15 - 13 =2
  12. 5 - 3 =2
  13. 18 - 7 =11
  14. 17 - 4 =13

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.