PencilGo
Sign in

Grade 1 · Math · On Level

Free Addition Within 20 worksheet - version 1

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 · On-level practice · 14 questions · Version PG-808GVA-L19P

Free printable
1.1 + 6 =
2.20 + 0 =
3.10 + 1 =
4.17 + 3 =
5.8 + 12 =
6.2 + 9 =
7.13 + 7 =
8.4 + 12 =
9.19 + 1 =
10.5 + 15 =
11.10 + 3 =
12.3 + 11 =
13.0 + 7 =
14.16 + 4 =
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 1
  1. 1 + 6 =7
  2. 20 + 0 =20
  3. 10 + 1 =11
  4. 17 + 3 =20
  5. 8 + 12 =20
  6. 2 + 9 =11
  7. 13 + 7 =20
  8. 4 + 12 =16
  9. 19 + 1 =20
  10. 5 + 15 =20
  11. 10 + 3 =13
  12. 3 + 11 =14
  13. 0 + 7 =7
  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.