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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 15

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 · On-level practice · 14 questions · Version PG-1H9SI3T-L19P

Free printable
1.13 + 7 =
2.19 + 1 =
3.2 + 18 =
4.10 + 10 =
5.11 + 0 =
6.17 + 3 =
7.13 + 1 =
8.8 + 1 =
9.14 + 6 =
10.8 + 5 =
11.4 + 16 =
12.10 + 8 =
13.11 + 9 =
14.0 + 17 =
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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 15
  1. 13 + 7 =20
  2. 19 + 1 =20
  3. 2 + 18 =20
  4. 10 + 10 =20
  5. 11 + 0 =11
  6. 17 + 3 =20
  7. 13 + 1 =14
  8. 8 + 1 =9
  9. 14 + 6 =20
  10. 8 + 5 =13
  11. 4 + 16 =20
  12. 10 + 8 =18
  13. 11 + 9 =20
  14. 0 + 17 =17

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.