A girl bought a comic book costing 625¢, a pen costing 570¢ and a chocolate bar costing 375¢. She paid her bill with a $20 note. How much change did she receive?
20 - (6.25 + 5.70 + 3.75) = $_________
I don’t understand
To calculate the change the girl received, we need to subtract the total cost of her purchases from the amount she paid with. Here's how you can do it:
Step 1: Convert the monetary values to the same unit. Since the girl paid with a $20 note, we will convert all the costs to dollars rather than cents. To do this, divide each cost by 100:
625¢ ÷ 100 = $6.25
570¢ ÷ 100 = $5.70
375¢ ÷ 100 = $3.75
Step 2: Add up the cost of all her purchases:
$6.25 + $5.70 + $3.75 = $15.70
Step 3: Subtract the total cost from the amount she paid with to find the change:
$20 - $15.70 = $4.30
Therefore, the girl received $4.30 in change.