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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 2

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-1W52IEP-PNVM

Free printable
1.2 + 8 =
2.15 + 5 =
3.12 + 8 =
4.10 + 2 =
5.8 + 2 =
6.13 + 2 =
7.17 + 3 =
8.18 + 2 =
9.8 + 1 =
10.11 + 7 =
11.12 + 1 =
12.0 + 10 =
13.2 + 17 =
14.3 + 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 2
  1. 2 + 8 =10
  2. 15 + 5 =20
  3. 12 + 8 =20
  4. 10 + 2 =12
  5. 8 + 2 =10
  6. 13 + 2 =15
  7. 17 + 3 =20
  8. 18 + 2 =20
  9. 8 + 1 =9
  10. 11 + 7 =18
  11. 12 + 1 =13
  12. 0 + 10 =10
  13. 2 + 17 =19
  14. 3 + 1 =4

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.