Grade 1 · Math · On Level
Free Subtraction Within 20 worksheet - version 6
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-JQ14WV-IB6W
1.2 - 1 =
2.1 - 1 =
3.8 - 4 =
4.7 - 2 =
5.10 - 7 =
6.17 - 8 =
7.6 - 2 =
8.18 - 11 =
9.10 - 8 =
10.13 - 6 =
11.9 - 2 =
12.11 - 1 =
13.19 - 15 =
14.11 - 3 =
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 6
- 2 - 1 =1
- 1 - 1 =0
- 8 - 4 =4
- 7 - 2 =5
- 10 - 7 =3
- 17 - 8 =9
- 6 - 2 =4
- 18 - 11 =7
- 10 - 8 =2
- 13 - 6 =7
- 9 - 2 =7
- 11 - 1 =10
- 19 - 15 =4
- 11 - 3 =8
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.