In this activity, you must look at the total spent and then use the shopkeeper's method to work out the change by 'counting on'.

Example

I have a £10 note and spend £7.43 on a CD. How much change will I get?

Answer

Using the diagram, we count on to convenient amounts of money.  

Add the red amounts to get the total change of    £2.57

We could also work out the change by doing a subtraction calculation: £10 - £7.43, but in this activity we are going to use the counting on method.

Next time you're paying for something in a shop, watch how the shop keeper counts out the change - it saves them from doing a subtraction sum in their heads!