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Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 11

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-1IDQWVP-L19P

Free printable
1.4 + 8 =
2.8 + 5 =
3.0 + 14 =
4.13 + 2 =
5.13 + 7 =
6.6 + 14 =
7.14 + 6 =
8.15 + 5 =
9.10 + 9 =
10.2 + 17 =
11.3 + 2 =
12.12 + 8 =
13.9 + 11 =
14.3 + 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 11
  1. 4 + 8 =12
  2. 8 + 5 =13
  3. 0 + 14 =14
  4. 13 + 2 =15
  5. 13 + 7 =20
  6. 6 + 14 =20
  7. 14 + 6 =20
  8. 15 + 5 =20
  9. 10 + 9 =19
  10. 2 + 17 =19
  11. 3 + 2 =5
  12. 12 + 8 =20
  13. 9 + 11 =20
  14. 3 + 8 =11

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.