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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 2

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-7Q8V6B-L19P

Free printable
1.9 + 11 =
2.18 + 2 =
3.20 + 0 =
4.19 + 1 =
5.14 + 6 =
6.17 + 3 =
7.12 + 8 =
8.9 + 6 =
9.9 + 9 =
10.10 + 10 =
11.0 + 10 =
12.1 + 3 =
13.3 + 17 =
14.11 + 4 =
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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 2
  1. 9 + 11 =20
  2. 18 + 2 =20
  3. 20 + 0 =20
  4. 19 + 1 =20
  5. 14 + 6 =20
  6. 17 + 3 =20
  7. 12 + 8 =20
  8. 9 + 6 =15
  9. 9 + 9 =18
  10. 10 + 10 =20
  11. 0 + 10 =10
  12. 1 + 3 =4
  13. 3 + 17 =20
  14. 11 + 4 =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.