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Grade 1 · Math · Challenge

Free Addition Within 20 worksheet - version 19

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-6IEG6L-1PYH

Free printable
1.2 + 8 =
2.14 + 6 =
3.10 + 10 =
4.15 + 5 =
5.18 + 2 =
6.11 + 4 =
7.16 + 1 =
8.7 + 4 =
9.14 + 5 =
10.20 + 0 =
11.19 + 1 =
12.8 + 2 =
13.7 + 12 =
14.16 + 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 19
  1. 2 + 8 =10
  2. 14 + 6 =20
  3. 10 + 10 =20
  4. 15 + 5 =20
  5. 18 + 2 =20
  6. 11 + 4 =15
  7. 16 + 1 =17
  8. 7 + 4 =11
  9. 14 + 5 =19
  10. 20 + 0 =20
  11. 19 + 1 =20
  12. 8 + 2 =10
  13. 7 + 12 =19
  14. 16 + 4 =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.