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Grade 1 · Math · On Level

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 · On-level practice · 14 questions · Version PG-YU3WMO-IB6W

Free printable
1.2 - 1 =
2.8 - 7 =
3.1 - 0 =
4.14 - 6 =
5.20 - 15 =
6.11 - 6 =
7.8 - 2 =
8.6 - 1 =
9.15 - 4 =
10.6 - 5 =
11.12 - 10 =
12.6 - 6 =
13.4 - 3 =
14.2 - 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. 2 - 1 =1
  2. 8 - 7 =1
  3. 1 - 0 =1
  4. 14 - 6 =8
  5. 20 - 15 =5
  6. 11 - 6 =5
  7. 8 - 2 =6
  8. 6 - 1 =5
  9. 15 - 4 =11
  10. 6 - 5 =1
  11. 12 - 10 =2
  12. 6 - 6 =0
  13. 4 - 3 =1
  14. 2 - 2 =0

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.