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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 10

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-D02N9E-EJCW

Free printable
1.11 - 6 =
2.9 - 6 =
3.16 - 16 =
4.5 - 4 =
5.19 - 13 =
6.15 - 3 =
7.13 - 10 =
8.2 - 1 =
9.8 - 5 =
10.16 - 3 =
11.19 - 14 =
12.2 - 0 =
13.1 - 0 =
14.4 - 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 10
  1. 11 - 6 =5
  2. 9 - 6 =3
  3. 16 - 16 =0
  4. 5 - 4 =1
  5. 19 - 13 =6
  6. 15 - 3 =12
  7. 13 - 10 =3
  8. 2 - 1 =1
  9. 8 - 5 =3
  10. 16 - 3 =13
  11. 19 - 14 =5
  12. 2 - 0 =2
  13. 1 - 0 =1
  14. 4 - 3 =1

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.