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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 6

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-1X90X6L-PNVM

Free printable
1.17 + 3 =
2.18 + 2 =
3.2 + 12 =
4.12 + 8 =
5.8 + 3 =
6.9 + 11 =
7.0 + 4 =
8.15 + 4 =
9.0 + 14 =
10.8 + 12 =
11.20 + 0 =
12.15 + 5 =
13.10 + 10 =
14.10 + 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 6
  1. 17 + 3 =20
  2. 18 + 2 =20
  3. 2 + 12 =14
  4. 12 + 8 =20
  5. 8 + 3 =11
  6. 9 + 11 =20
  7. 0 + 4 =4
  8. 15 + 4 =19
  9. 0 + 14 =14
  10. 8 + 12 =20
  11. 20 + 0 =20
  12. 15 + 5 =20
  13. 10 + 10 =20
  14. 10 + 3 =13

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.