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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 16

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-BC513K-EJCW

Free printable
1.8 - 4 =
2.16 - 5 =
3.16 - 15 =
4.2 - 2 =
5.10 - 7 =
6.4 - 1 =
7.1 - 0 =
8.20 - 2 =
9.18 - 14 =
10.15 - 13 =
11.9 - 8 =
12.2 - 0 =
13.14 - 9 =
14.13 - 9 =
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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 16
  1. 8 - 4 =4
  2. 16 - 5 =11
  3. 16 - 15 =1
  4. 2 - 2 =0
  5. 10 - 7 =3
  6. 4 - 1 =3
  7. 1 - 0 =1
  8. 20 - 2 =18
  9. 18 - 14 =4
  10. 15 - 13 =2
  11. 9 - 8 =1
  12. 2 - 0 =2
  13. 14 - 9 =5
  14. 13 - 9 =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.