Grade 1 · Math · On Level
Free Subtraction Within 20 worksheet - version 13
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-1081X3J-IB6W
1.14 - 5 =
2.8 - 7 =
3.20 - 6 =
4.9 - 0 =
5.10 - 9 =
6.20 - 19 =
7.11 - 8 =
8.2 - 0 =
9.13 - 11 =
10.20 - 15 =
11.17 - 15 =
12.16 - 16 =
13.9 - 3 =
14.17 - 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 13
- 14 - 5 =9
- 8 - 7 =1
- 20 - 6 =14
- 9 - 0 =9
- 10 - 9 =1
- 20 - 19 =1
- 11 - 8 =3
- 2 - 0 =2
- 13 - 11 =2
- 20 - 15 =5
- 17 - 15 =2
- 16 - 16 =0
- 9 - 3 =6
- 17 - 11 =6
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.