Grade 1 · Math · On Level
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 · On-level practice · 14 questions · Version PG-1I3RB6Q-L19P
1.0 + 14 =
2.4 + 11 =
3.15 + 5 =
4.1 + 13 =
5.5 + 5 =
6.17 + 3 =
7.19 + 1 =
8.1 + 14 =
9.15 + 0 =
10.13 + 7 =
11.3 + 4 =
12.1 + 0 =
13.0 + 3 =
14.6 + 12 =
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
- 0 + 14 =14
- 4 + 11 =15
- 15 + 5 =20
- 1 + 13 =14
- 5 + 5 =10
- 17 + 3 =20
- 19 + 1 =20
- 1 + 14 =15
- 15 + 0 =15
- 13 + 7 =20
- 3 + 4 =7
- 1 + 0 =1
- 0 + 3 =3
- 6 + 12 =18
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.