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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 6

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-16ZVKVZ-EJCW

Free printable
1.13 - 13 =
2.1 - 0 =
3.14 - 9 =
4.14 - 4 =
5.15 - 8 =
6.13 - 5 =
7.10 - 4 =
8.3 - 2 =
9.16 - 2 =
10.19 - 4 =
11.15 - 0 =
12.11 - 0 =
13.3 - 1 =
14.8 - 3 =
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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 6
  1. 13 - 13 =0
  2. 1 - 0 =1
  3. 14 - 9 =5
  4. 14 - 4 =10
  5. 15 - 8 =7
  6. 13 - 5 =8
  7. 10 - 4 =6
  8. 3 - 2 =1
  9. 16 - 2 =14
  10. 19 - 4 =15
  11. 15 - 0 =15
  12. 11 - 0 =11
  13. 3 - 1 =2
  14. 8 - 3 =5

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.