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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 11

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-1B95JL7-PNVM

Free printable
1.3 + 8 =
2.0 + 18 =
3.9 + 8 =
4.8 + 6 =
5.4 + 2 =
6.11 + 8 =
7.14 + 6 =
8.6 + 3 =
9.20 + 0 =
10.2 + 15 =
11.10 + 8 =
12.6 + 14 =
13.4 + 1 =
14.13 + 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 11
  1. 3 + 8 =11
  2. 0 + 18 =18
  3. 9 + 8 =17
  4. 8 + 6 =14
  5. 4 + 2 =6
  6. 11 + 8 =19
  7. 14 + 6 =20
  8. 6 + 3 =9
  9. 20 + 0 =20
  10. 2 + 15 =17
  11. 10 + 8 =18
  12. 6 + 14 =20
  13. 4 + 1 =5
  14. 13 + 3 =16

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.