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Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 17

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-1CX35R1-PNVM

Free printable
1.18 + 2 =
2.14 + 2 =
3.19 + 1 =
4.14 + 6 =
5.11 + 2 =
6.11 + 9 =
7.17 + 3 =
8.12 + 0 =
9.16 + 4 =
10.3 + 17 =
11.7 + 13 =
12.13 + 7 =
13.9 + 11 =
14.15 + 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 17
  1. 18 + 2 =20
  2. 14 + 2 =16
  3. 19 + 1 =20
  4. 14 + 6 =20
  5. 11 + 2 =13
  6. 11 + 9 =20
  7. 17 + 3 =20
  8. 12 + 0 =12
  9. 16 + 4 =20
  10. 3 + 17 =20
  11. 7 + 13 =20
  12. 13 + 7 =20
  13. 9 + 11 =20
  14. 15 + 5 =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.