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Grade 1 · Math · Challenge

Free Subtraction Within 20 worksheet - version 9

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-18DTLCU-EJCW

Free printable
1.19 - 3 =
2.8 - 2 =
3.2 - 2 =
4.17 - 14 =
5.20 - 7 =
6.9 - 8 =
7.9 - 1 =
8.3 - 1 =
9.2 - 1 =
10.4 - 1 =
11.4 - 3 =
12.2 - 0 =
13.5 - 0 =
14.15 - 11 =
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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 9
  1. 19 - 3 =16
  2. 8 - 2 =6
  3. 2 - 2 =0
  4. 17 - 14 =3
  5. 20 - 7 =13
  6. 9 - 8 =1
  7. 9 - 1 =8
  8. 3 - 1 =2
  9. 2 - 1 =1
  10. 4 - 1 =3
  11. 4 - 3 =1
  12. 2 - 0 =2
  13. 5 - 0 =5
  14. 15 - 11 =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.