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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 3

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 · Stretch challenge · 14 questions · Version PG-15LXKF4-EJCW

Free printable
1.9 - 6 =
2.19 - 6 =
3.1 - 1 =
4.11 - 9 =
5.13 - 11 =
6.7 - 0 =
7.15 - 12 =
8.18 - 8 =
9.10 - 4 =
10.17 - 3 =
11.8 - 0 =
12.13 - 10 =
13.1 - 0 =
14.16 - 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 3
  1. 9 - 6 =3
  2. 19 - 6 =13
  3. 1 - 1 =0
  4. 11 - 9 =2
  5. 13 - 11 =2
  6. 7 - 0 =7
  7. 15 - 12 =3
  8. 18 - 8 =10
  9. 10 - 4 =6
  10. 17 - 3 =14
  11. 8 - 0 =8
  12. 13 - 10 =3
  13. 1 - 0 =1
  14. 16 - 13 =3

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.