Grade 1 · Math · Building Confidence
Free Subtraction Within 20 worksheet - version 12
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-1MEZ08U-1PAM
1.14 - 14 =
2.10 - 1 =
3.4 - 4 =
4.4 - 3 =
5.1 - 0 =
6.3 - 1 =
7.19 - 10 =
8.3 - 0 =
9.4 - 2 =
10.13 - 6 =
11.10 - 2 =
12.1 - 1 =
13.4 - 0 =
14.6 - 0 =
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 12
- 14 - 14 =0
- 10 - 1 =9
- 4 - 4 =0
- 4 - 3 =1
- 1 - 0 =1
- 3 - 1 =2
- 19 - 10 =9
- 3 - 0 =3
- 4 - 2 =2
- 13 - 6 =7
- 10 - 2 =8
- 1 - 1 =0
- 4 - 0 =4
- 6 - 0 =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.