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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 20

Practice addition facts and strategies with sums through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.

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Addition Within 20

Grade 1 · Building confidence · 14 questions · Version PG-7L21HV-PNVM

Free printable
1.3 + 7 =
2.17 + 3 =
3.19 + 0 =
4.7 + 13 =
5.11 + 3 =
6.20 + 0 =
7.18 + 2 =
8.3 + 2 =
9.14 + 6 =
10.2 + 14 =
11.5 + 1 =
12.12 + 8 =
13.3 + 3 =
14.17 + 0 =
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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 20
  1. 3 + 7 =10
  2. 17 + 3 =20
  3. 19 + 0 =19
  4. 7 + 13 =20
  5. 11 + 3 =14
  6. 20 + 0 =20
  7. 18 + 2 =20
  8. 3 + 2 =5
  9. 14 + 6 =20
  10. 2 + 14 =16
  11. 5 + 1 =6
  12. 12 + 8 =20
  13. 3 + 3 =6
  14. 17 + 0 =17

Worked example

8 + 7 = 15. Make ten: 8 + 2 + 5 = 15.

Common mistake

Losing part of the second addend when making ten.

Helpful hint

Look for a way to make 10 first.