Grade 1 · Math · Building Confidence
Free Addition Within 20 worksheet - version 4
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-1WP1PSN-PNVM
1.3 + 14 =
2.11 + 9 =
3.5 + 15 =
4.2 + 5 =
5.5 + 14 =
6.10 + 1 =
7.4 + 16 =
8.0 + 2 =
9.8 + 12 =
10.16 + 4 =
11.0 + 14 =
12.12 + 8 =
13.9 + 4 =
14.9 + 11 =
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 4
- 3 + 14 =17
- 11 + 9 =20
- 5 + 15 =20
- 2 + 5 =7
- 5 + 14 =19
- 10 + 1 =11
- 4 + 16 =20
- 0 + 2 =2
- 8 + 12 =20
- 16 + 4 =20
- 0 + 14 =14
- 12 + 8 =20
- 9 + 4 =13
- 9 + 11 =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.