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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 11

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-DA28YD-EJCW

Free printable
1.20 - 9 =
2.8 - 0 =
3.4 - 4 =
4.20 - 13 =
5.19 - 13 =
6.16 - 4 =
7.18 - 0 =
8.12 - 8 =
9.6 - 3 =
10.11 - 6 =
11.6 - 4 =
12.4 - 2 =
13.19 - 17 =
14.11 - 5 =
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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 11
  1. 20 - 9 =11
  2. 8 - 0 =8
  3. 4 - 4 =0
  4. 20 - 13 =7
  5. 19 - 13 =6
  6. 16 - 4 =12
  7. 18 - 0 =18
  8. 12 - 8 =4
  9. 6 - 3 =3
  10. 11 - 6 =5
  11. 6 - 4 =2
  12. 4 - 2 =2
  13. 19 - 17 =2
  14. 11 - 5 =6

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.