What's the easiest way to learn how to count back money and change on the cash register?

so they'll let you run the cash register don't think im stupid from not knowing thisWhat's the easiest way to learn how to count back money and change on the cash register?
You start with the total amount of the sale and then count UPWARD to the amount tendered. For example, if the total sale is $5.65 and the customer gave you a $10 bill, you count UPWARD from $5.65 to $10. The result will be the correct change amount.