Traditional Subtraction

Example
20

-

10

___

10

About
The Traditional math method is where you stack your numbers.

When This happens, what do you do?
27

-

19

___

?

This is can happen in subtraction. What you’re subtracting, the ones place of that number is bigger.

First, you will change the 7 to a 17. 17 - 9 = 8.

Then, you change the 20 to a 10. 10 - 10 = 0.

Lastly, do 8 + 0 = 8. And then you got your answer!