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Grade 1 · Math · Building Confidence

Free Subtraction Within 20 worksheet - version 15

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-1N8XTBR-1PAM

Free printable
1.7 - 4 =
2.14 - 10 =
3.16 - 3 =
4.7 - 6 =
5.4 - 1 =
6.19 - 10 =
7.6 - 4 =
8.15 - 7 =
9.5 - 5 =
10.4 - 2 =
11.1 - 0 =
12.3 - 1 =
13.16 - 16 =
14.11 - 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 15
  1. 7 - 4 =3
  2. 14 - 10 =4
  3. 16 - 3 =13
  4. 7 - 6 =1
  5. 4 - 1 =3
  6. 19 - 10 =9
  7. 6 - 4 =2
  8. 15 - 7 =8
  9. 5 - 5 =0
  10. 4 - 2 =2
  11. 1 - 0 =1
  12. 3 - 1 =2
  13. 16 - 16 =0
  14. 11 - 3 =8

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.