Free · Worked example · 64 problems · Answer key · US Letter
How to do it
15 − 9: take 10 away and add 1 back. That gives 6.
17−9=17−10+1=7+1=8take away 10, then add 1 back Example problems
- 14−8=
- 11−9=
- 11−8=
- 16−9=
Subtraction facts within 20
- Subtracting 1 and 2
- Subtracting 3 and 4
- Subtracting from 10
- Subtraction facts within 10
- Teen numbers minus ones
- Subtracting 5, 6 and 7
- Subtracting 8 and 9
- Missing number addition and subtraction
- Mixed addition and subtraction to 20