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Grade 1 · Math · Challenge

Free Addition Within 20 worksheet - version 7

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-1OBLRL8-1PYH

Free printable
1.11 + 2 =
2.12 + 4 =
3.13 + 6 =
4.3 + 11 =
5.4 + 0 =
6.3 + 5 =
7.20 + 0 =
8.15 + 5 =
9.10 + 10 =
10.8 + 12 =
11.8 + 4 =
12.9 + 1 =
13.19 + 1 =
14.9 + 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 7
  1. 11 + 2 =13
  2. 12 + 4 =16
  3. 13 + 6 =19
  4. 3 + 11 =14
  5. 4 + 0 =4
  6. 3 + 5 =8
  7. 20 + 0 =20
  8. 15 + 5 =20
  9. 10 + 10 =20
  10. 8 + 12 =20
  11. 8 + 4 =12
  12. 9 + 1 =10
  13. 19 + 1 =20
  14. 9 + 11 =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.