Grade 1 · Math · Challenge
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 · Stretch challenge · 14 questions · Version PG-CQ31KF-EJCW
1.17 - 7 =
2.3 - 1 =
3.6 - 6 =
4.8 - 0 =
5.9 - 7 =
6.5 - 2 =
7.5 - 4 =
8.16 - 6 =
9.10 - 2 =
10.9 - 3 =
11.2 - 0 =
12.14 - 14 =
13.13 - 9 =
14.11 - 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 13
- 17 - 7 =10
- 3 - 1 =2
- 6 - 6 =0
- 8 - 0 =8
- 9 - 7 =2
- 5 - 2 =3
- 5 - 4 =1
- 16 - 6 =10
- 10 - 2 =8
- 9 - 3 =6
- 2 - 0 =2
- 14 - 14 =0
- 13 - 9 =4
- 11 - 0 =11
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.