Subtract Within 20
Subtract numbers within 20
Open skill pagenumber line subtraction worksheets
Number Line Subtraction Worksheets and Online Practice
Subtraction facts can be solved by counting back, using a number line, or asking what addend is missing.
Visual method
Subtract by counting back or thinking addition
- Start with the whole amount.
- Count back the amount being taken away.
- Check with the related addition fact.
On this page
What this method page covers
- method summary
- visual model
- worksheet preview
- online practice
- common mistakes
- related skills
Common mistakes
Common subtraction mistakes
- Subtracting the smaller digit from the larger digit in each column
- Reversing the whole and the part
Connected skills
Move from the model into skill practice
Subtract Within 100
Subtract numbers within 100
Open skill page