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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 20

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-1GFQJIX-L19P

Free printable
1.19 + 1 =
2.16 + 4 =
3.5 + 9 =
4.1 + 13 =
5.15 + 4 =
6.9 + 0 =
7.4 + 10 =
8.10 + 10 =
9.2 + 3 =
10.6 + 8 =
11.13 + 6 =
12.13 + 7 =
13.2 + 17 =
14.15 + 5 =
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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 20
  1. 19 + 1 =20
  2. 16 + 4 =20
  3. 5 + 9 =14
  4. 1 + 13 =14
  5. 15 + 4 =19
  6. 9 + 0 =9
  7. 4 + 10 =14
  8. 10 + 10 =20
  9. 2 + 3 =5
  10. 6 + 8 =14
  11. 13 + 6 =19
  12. 13 + 7 =20
  13. 2 + 17 =19
  14. 15 + 5 =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.