Grade 1 · Math · Building Confidence
Free Addition Within 20 worksheet - version 10
Practice addition facts and strategies with sums through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.
Addition Within 20
Grade 1 · Building confidence · 14 questions · Version PG-1AZ5XW8-PNVM
1.14 + 5 =
2.10 + 9 =
3.17 + 3 =
4.1 + 8 =
5.16 + 4 =
6.12 + 8 =
7.5 + 15 =
8.11 + 9 =
9.4 + 14 =
10.13 + 7 =
11.6 + 7 =
12.2 + 2 =
13.9 + 3 =
14.4 + 16 =
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 10
- 14 + 5 =19
- 10 + 9 =19
- 17 + 3 =20
- 1 + 8 =9
- 16 + 4 =20
- 12 + 8 =20
- 5 + 15 =20
- 11 + 9 =20
- 4 + 14 =18
- 13 + 7 =20
- 6 + 7 =13
- 2 + 2 =4
- 9 + 3 =12
- 4 + 16 =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.