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Grade 1 · Math · On Level

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 · On-level practice · 14 questions · Version PG-1KLNQFH-L19P

Free printable
1.19 + 1 =
2.15 + 5 =
3.2 + 11 =
4.2 + 9 =
5.3 + 2 =
6.8 + 9 =
7.18 + 2 =
8.2 + 6 =
9.14 + 6 =
10.11 + 0 =
11.0 + 1 =
12.11 + 9 =
13.12 + 8 =
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. 19 + 1 =20
  2. 15 + 5 =20
  3. 2 + 11 =13
  4. 2 + 9 =11
  5. 3 + 2 =5
  6. 8 + 9 =17
  7. 18 + 2 =20
  8. 2 + 6 =8
  9. 14 + 6 =20
  10. 11 + 0 =11
  11. 0 + 1 =1
  12. 11 + 9 =20
  13. 12 + 8 =20
  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.