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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 16

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-1GFTP0W-L19P

Free printable
1.16 + 4 =
2.7 + 0 =
3.9 + 11 =
4.15 + 0 =
5.14 + 3 =
6.0 + 20 =
7.4 + 8 =
8.19 + 1 =
9.7 + 9 =
10.2 + 6 =
11.8 + 10 =
12.15 + 5 =
13.15 + 1 =
14.17 + 3 =
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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 16
  1. 16 + 4 =20
  2. 7 + 0 =7
  3. 9 + 11 =20
  4. 15 + 0 =15
  5. 14 + 3 =17
  6. 0 + 20 =20
  7. 4 + 8 =12
  8. 19 + 1 =20
  9. 7 + 9 =16
  10. 2 + 6 =8
  11. 8 + 10 =18
  12. 15 + 5 =20
  13. 15 + 1 =16
  14. 17 + 3 =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.