A word problem is a mathematical question that is presented in the form of a story or real-life scenario, requiring the reader to extract the relevant information to solve it.

To find out how much money is left after a purchase, subtract the cost of the item from the total amount of money you had before the purchase.

$5

Change is the amount of money returned to a buyer after they have paid for a purchase that costs less than the amount they paid.

To calculate change from a $20 bill, subtract the total cost of the items purchased from $20.

The total cost of items is the sum of the prices of all items purchased.

$8.90