Grade 1 · Math · Challenge
Free Subtraction Within 20 worksheet - version 5
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-179V6KY-EJCW
1.
11 - 10 =
2.
9 - 1 =
3.
19 - 7 =
4.
6 - 2 =
5.
11 - 0 =
6.
17 - 0 =
7.
14 - 8 =
8.
20 - 19 =
9.
13 - 12 =
10.
3 - 0 =
11.
13 - 10 =
12.
6 - 0 =
13.
13 - 1 =
14.
18 - 14 =
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 5
- 11 - 10 =1
- 9 - 1 =8
- 19 - 7 =12
- 6 - 2 =4
- 11 - 0 =11
- 17 - 0 =17
- 14 - 8 =6
- 20 - 19 =1
- 13 - 12 =1
- 3 - 0 =3
- 13 - 10 =3
- 6 - 0 =6
- 13 - 1 =12
- 18 - 14 =4
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.