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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 16

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 · Building confidence · 14 questions · Version PG-1CN3K22-PNVM

Free printable
1.14 + 6 =
2.11 + 9 =
3.5 + 3 =
4.16 + 2 =
5.10 + 4 =
6.12 + 8 =
7.7 + 1 =
8.1 + 9 =
9.3 + 17 =
10.19 + 1 =
11.15 + 5 =
12.0 + 0 =
13.8 + 8 =
14.9 + 5 =
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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 16
  1. 14 + 6 =20
  2. 11 + 9 =20
  3. 5 + 3 =8
  4. 16 + 2 =18
  5. 10 + 4 =14
  6. 12 + 8 =20
  7. 7 + 1 =8
  8. 1 + 9 =10
  9. 3 + 17 =20
  10. 19 + 1 =20
  11. 15 + 5 =20
  12. 0 + 0 =0
  13. 8 + 8 =16
  14. 9 + 5 =14

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.