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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 5

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-1WF243O-PNVM

Free printable
1.16 + 4 =
2.0 + 3 =
3.9 + 6 =
4.15 + 5 =
5.17 + 3 =
6.5 + 1 =
7.1 + 17 =
8.20 + 0 =
9.7 + 5 =
10.5 + 2 =
11.10 + 1 =
12.13 + 6 =
13.4 + 7 =
14.18 + 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 5
  1. 16 + 4 =20
  2. 0 + 3 =3
  3. 9 + 6 =15
  4. 15 + 5 =20
  5. 17 + 3 =20
  6. 5 + 1 =6
  7. 1 + 17 =18
  8. 20 + 0 =20
  9. 7 + 5 =12
  10. 5 + 2 =7
  11. 10 + 1 =11
  12. 13 + 6 =19
  13. 4 + 7 =11
  14. 18 + 1 =19

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.