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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 3

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-7G99HC-L19P

Free printable
1.16 + 4 =
2.4 + 11 =
3.2 + 15 =
4.13 + 7 =
5.1 + 14 =
6.5 + 15 =
7.5 + 14 =
8.6 + 13 =
9.3 + 15 =
10.2 + 18 =
11.4 + 16 =
12.12 + 8 =
13.20 + 0 =
14.13 + 2 =
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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 3
  1. 16 + 4 =20
  2. 4 + 11 =15
  3. 2 + 15 =17
  4. 13 + 7 =20
  5. 1 + 14 =15
  6. 5 + 15 =20
  7. 5 + 14 =19
  8. 6 + 13 =19
  9. 3 + 15 =18
  10. 2 + 18 =20
  11. 4 + 16 =20
  12. 12 + 8 =20
  13. 20 + 0 =20
  14. 13 + 2 =15

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.