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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 17

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-1GPTAPV-L19P

Free printable
1.8 + 4 =
2.19 + 1 =
3.0 + 18 =
4.1 + 10 =
5.2 + 18 =
6.17 + 3 =
7.8 + 2 =
8.15 + 5 =
9.12 + 1 =
10.0 + 0 =
11.16 + 4 =
12.18 + 2 =
13.13 + 6 =
14.3 + 15 =
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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 17
  1. 8 + 4 =12
  2. 19 + 1 =20
  3. 0 + 18 =18
  4. 1 + 10 =11
  5. 2 + 18 =20
  6. 17 + 3 =20
  7. 8 + 2 =10
  8. 15 + 5 =20
  9. 12 + 1 =13
  10. 0 + 0 =0
  11. 16 + 4 =20
  12. 18 + 2 =20
  13. 13 + 6 =19
  14. 3 + 15 =18

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.