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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 2

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-15VX643-EJCW

Free printable
1.5 - 1 =
2.17 - 1 =
3.7 - 6 =
4.11 - 8 =
5.4 - 3 =
6.8 - 6 =
7.11 - 5 =
8.8 - 3 =
9.14 - 7 =
10.16 - 16 =
11.5 - 2 =
12.15 - 4 =
13.3 - 2 =
14.18 - 8 =
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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 2
  1. 5 - 1 =4
  2. 17 - 1 =16
  3. 7 - 6 =1
  4. 11 - 8 =3
  5. 4 - 3 =1
  6. 8 - 6 =2
  7. 11 - 5 =6
  8. 8 - 3 =5
  9. 14 - 7 =7
  10. 16 - 16 =0
  11. 5 - 2 =3
  12. 15 - 4 =11
  13. 3 - 2 =1
  14. 18 - 8 =10

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.