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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 5

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-179V6KY-EJCW

Free printable
1.11 - 10 =
2.9 - 1 =
3.19 - 7 =
4.6 - 2 =
5.11 - 0 =
6.17 - 0 =
7.14 - 8 =
8.20 - 19 =
9.13 - 12 =
10.3 - 0 =
11.13 - 10 =
12.6 - 0 =
13.13 - 1 =
14.18 - 14 =
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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 5
  1. 11 - 10 =1
  2. 9 - 1 =8
  3. 19 - 7 =12
  4. 6 - 2 =4
  5. 11 - 0 =11
  6. 17 - 0 =17
  7. 14 - 8 =6
  8. 20 - 19 =1
  9. 13 - 12 =1
  10. 3 - 0 =3
  11. 13 - 10 =3
  12. 6 - 0 =6
  13. 13 - 1 =12
  14. 18 - 14 =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.