PencilGo
Sign in

Grade 1 · Math · Building Confidence

Free Addition Within 20 worksheet - version 9

Practice addition facts and strategies with sums through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.

Download free PDF

Addition Within 20

Grade 1 · Building confidence · 14 questions · Version PG-1T36VS0-PNVM

Free printable
1.2 + 8 =
2.11 + 9 =
3.16 + 0 =
4.14 + 6 =
5.9 + 11 =
6.7 + 13 =
7.0 + 0 =
8.20 + 0 =
9.2 + 9 =
10.0 + 2 =
11.6 + 8 =
12.16 + 4 =
13.15 + 5 =
14.17 + 3 =
Worksheet PDFAnswer keyCustomize

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 9
  1. 2 + 8 =10
  2. 11 + 9 =20
  3. 16 + 0 =16
  4. 14 + 6 =20
  5. 9 + 11 =20
  6. 7 + 13 =20
  7. 0 + 0 =0
  8. 20 + 0 =20
  9. 2 + 9 =11
  10. 0 + 2 =2
  11. 6 + 8 =14
  12. 16 + 4 =20
  13. 15 + 5 =20
  14. 17 + 3 =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.