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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 7

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-1WZ1BHM-PNVM

Free printable
1.13 + 7 =
2.14 + 0 =
3.12 + 8 =
4.17 + 3 =
5.5 + 6 =
6.7 + 2 =
7.6 + 6 =
8.18 + 2 =
9.19 + 1 =
10.3 + 15 =
11.15 + 5 =
12.4 + 14 =
13.5 + 15 =
14.1 + 12 =
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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 7
  1. 13 + 7 =20
  2. 14 + 0 =14
  3. 12 + 8 =20
  4. 17 + 3 =20
  5. 5 + 6 =11
  6. 7 + 2 =9
  7. 6 + 6 =12
  8. 18 + 2 =20
  9. 19 + 1 =20
  10. 3 + 15 =18
  11. 15 + 5 =20
  12. 4 + 14 =18
  13. 5 + 15 =20
  14. 1 + 12 =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.