A Handy Math Trick

Count-Up Subtraction

Start at the small number. Jump forward to easy numbers, like 10s and 100s. Then add your jumps.

Try an example:
−
Problem: 72 − 38 = 34
Start at 38. Jump to 72. Your jumps add to 34.
Showing Jump 3 of 3

Your Jumps Click any jump to highlight

Add Your Jumps Up:

Two Ways to Subtract Try count-up

Old Way: Borrowing

Borrowing can be hard when there are lots of zeros.

New Way: Counting Up
💡 Tip: When you subtract with zeros, like 500 − 237, count up so you do not need to borrow.