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Grade 1 · Math · Challenge

Free Addition Within 20 worksheet - version 4

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-1P5KKO5-1PYH

Free printable
1.8 + 12 =
2.11 + 9 =
3.14 + 6 =
4.1 + 19 =
5.6 + 14 =
6.5 + 3 =
7.2 + 7 =
8.9 + 1 =
9.7 + 7 =
10.7 + 13 =
11.2 + 0 =
12.12 + 8 =
13.9 + 10 =
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 4
  1. 8 + 12 =20
  2. 11 + 9 =20
  3. 14 + 6 =20
  4. 1 + 19 =20
  5. 6 + 14 =20
  6. 5 + 3 =8
  7. 2 + 7 =9
  8. 9 + 1 =10
  9. 7 + 7 =14
  10. 7 + 13 =20
  11. 2 + 0 =2
  12. 12 + 8 =20
  13. 9 + 10 =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.