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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 4

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-9E6HC5-L19P

Free printable
1.11 + 9 =
2.10 + 1 =
3.4 + 4 =
4.13 + 4 =
5.7 + 3 =
6.9 + 11 =
7.14 + 5 =
8.19 + 1 =
9.0 + 19 =
10.10 + 10 =
11.1 + 17 =
12.2 + 5 =
13.20 + 0 =
14.12 + 8 =
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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 4
  1. 11 + 9 =20
  2. 10 + 1 =11
  3. 4 + 4 =8
  4. 13 + 4 =17
  5. 7 + 3 =10
  6. 9 + 11 =20
  7. 14 + 5 =19
  8. 19 + 1 =20
  9. 0 + 19 =19
  10. 10 + 10 =20
  11. 1 + 17 =18
  12. 2 + 5 =7
  13. 20 + 0 =20
  14. 12 + 8 =20

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.