Grade 1 · Math · Building Confidence
Free Subtraction Within 20 worksheet - version 14
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 · Building confidence · 14 questions · Version PG-1MYY7MS-1PAM
1.20 - 15 =
2.8 - 0 =
3.7 - 6 =
4.11 - 8 =
5.14 - 2 =
6.2 - 0 =
7.8 - 6 =
8.18 - 11 =
9.7 - 0 =
10.13 - 5 =
11.2 - 1 =
12.17 - 15 =
13.12 - 3 =
14.1 - 1 =
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 14
- 20 - 15 =5
- 8 - 0 =8
- 7 - 6 =1
- 11 - 8 =3
- 14 - 2 =12
- 2 - 0 =2
- 8 - 6 =2
- 18 - 11 =7
- 7 - 0 =7
- 13 - 5 =8
- 2 - 1 =1
- 17 - 15 =2
- 12 - 3 =9
- 1 - 1 =0
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.