Subtraction

You probably subtract numbers every day.

For example

If you buy a book costing £14.95, how much change do you get from a £20.00 note?

Sometimes, if the numbers are large or awkward we might want to write the calculation down.

Worked example:

Find the difference between 4197 and 2425

4	1	9	7
2	4	2	5	-
1	7	7	2