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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 12

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-1BJ55A6-PNVM

Free printable
1.14 + 6 =
2.8 + 12 =
3.10 + 8 =
4.16 + 3 =
5.12 + 8 =
6.0 + 10 =
7.6 + 10 =
8.18 + 2 =
9.7 + 12 =
10.16 + 4 =
11.5 + 0 =
12.11 + 9 =
13.4 + 2 =
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 12
  1. 14 + 6 =20
  2. 8 + 12 =20
  3. 10 + 8 =18
  4. 16 + 3 =19
  5. 12 + 8 =20
  6. 0 + 10 =10
  7. 6 + 10 =16
  8. 18 + 2 =20
  9. 7 + 12 =19
  10. 16 + 4 =20
  11. 5 + 0 =5
  12. 11 + 9 =20
  13. 4 + 2 =6
  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.