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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 1

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-1VB3PBS-PNVM

Free printable
1.11 + 0 =
2.17 + 3 =
3.16 + 0 =
4.8 + 8 =
5.10 + 10 =
6.2 + 8 =
7.3 + 17 =
8.15 + 5 =
9.20 + 0 =
10.3 + 11 =
11.12 + 8 =
12.1 + 9 =
13.11 + 9 =
14.19 + 1 =
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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 1
  1. 11 + 0 =11
  2. 17 + 3 =20
  3. 16 + 0 =16
  4. 8 + 8 =16
  5. 10 + 10 =20
  6. 2 + 8 =10
  7. 3 + 17 =20
  8. 15 + 5 =20
  9. 20 + 0 =20
  10. 3 + 11 =14
  11. 12 + 8 =20
  12. 1 + 9 =10
  13. 11 + 9 =20
  14. 19 + 1 =20

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.