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Grade 1 · Math · Challenge

Free Addition Within 20 worksheet - version 14

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 · Stretch challenge · 14 questions · Version PG-2WJM5Y-1PYH

Free printable
1.2 + 11 =
2.9 + 11 =
3.4 + 14 =
4.3 + 14 =
5.10 + 10 =
6.7 + 1 =
7.8 + 0 =
8.11 + 2 =
9.11 + 9 =
10.3 + 2 =
11.20 + 0 =
12.6 + 11 =
13.1 + 8 =
14.7 + 11 =
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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 14
  1. 2 + 11 =13
  2. 9 + 11 =20
  3. 4 + 14 =18
  4. 3 + 14 =17
  5. 10 + 10 =20
  6. 7 + 1 =8
  7. 8 + 0 =8
  8. 11 + 2 =13
  9. 11 + 9 =20
  10. 3 + 2 =5
  11. 20 + 0 =20
  12. 6 + 11 =17
  13. 1 + 8 =9
  14. 7 + 11 =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.