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Grade 1 · Math · Building Confidence

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 · Building confidence · 14 questions · Version PG-1NIXF0Q-1PAM

Free printable
1.5 - 5 =
2.11 - 10 =
3.16 - 7 =
4.16 - 13 =
5.18 - 16 =
6.20 - 12 =
7.11 - 5 =
8.16 - 0 =
9.20 - 13 =
10.11 - 4 =
11.16 - 11 =
12.7 - 5 =
13.11 - 9 =
14.6 - 2 =
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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. 5 - 5 =0
  2. 11 - 10 =1
  3. 16 - 7 =9
  4. 16 - 13 =3
  5. 18 - 16 =2
  6. 20 - 12 =8
  7. 11 - 5 =6
  8. 16 - 0 =16
  9. 20 - 13 =7
  10. 11 - 4 =7
  11. 16 - 11 =5
  12. 7 - 5 =2
  13. 11 - 9 =2
  14. 6 - 2 =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.