Training Grounds
Subtraction
Jump backwards on the number line and practise borrowing with circus lights.
Try the tool, then solve five.

thinking
72
- 28
44
Tips
Count back for small subtractions.
Count up to find the difference between close numbers.
Borrow one ten when there are not enough ones.
Practice Problems
1. 84 - 39 equals?
2. 100 - 47 equals?
3. 72 - 28 equals?
4. 56 - 19 equals?
5. 43 - 17 equals?