Grade 1 · Math · On Level
Free Subtraction Within 20 worksheet - version 20
Build subtraction fluency with numbers through 20. This printable version includes 14 grade-appropriate questions and a separate answer sheet.
Subtraction Within 20
Grade 1 · On-level practice · 14 questions · Version PG-YU0R4P-IB6W
1.11 - 3 =
2.13 - 2 =
3.10 - 8 =
4.8 - 1 =
5.5 - 3 =
6.16 - 7 =
7.19 - 12 =
8.6 - 0 =
9.12 - 6 =
10.10 - 0 =
11.5 - 1 =
12.17 - 13 =
13.2 - 2 =
14.11 - 8 =
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 20
- 11 - 3 =8
- 13 - 2 =11
- 10 - 8 =2
- 8 - 1 =7
- 5 - 3 =2
- 16 - 7 =9
- 19 - 12 =7
- 6 - 0 =6
- 12 - 6 =6
- 10 - 0 =10
- 5 - 1 =4
- 17 - 13 =4
- 2 - 2 =0
- 11 - 8 =3
Worked example
16 - 7 = 9. Break 7 into 6 and 1: 16 - 6 - 1 = 9.
Common mistake
Switching the order of the numbers because subtraction is not commutative.
Helpful hint
Count back to 10, then subtract what remains.