Glen bought a total of 20 chocolate bars and mini cupcakes. Each chocolate bar cost 40¢. Each mini cupcake cost 50¢. He paid a total of $9.40. How many mini cupcakes did he buy?
Number of
chocolate bars |
Amount paid
for the chocolate bars |
Number of
mini cupcakes |
Amount paid
for the chocolate bars |
Total paid |
| 20 |
20 x 40
= 800¢ |
0 |
0 |
800¢ |
| 19 |
19 x 40
= 760¢ |
1 |
1 x 50
= 50¢ |
810¢ |
| 6 |
6 x 40
= 240¢ |
14 |
14 x 50
= 700¢ |
940¢ |
$1 = 100¢
$9.40 = 940¢
Amount paid if all were chocolate bars
= 20 x 40
= 800¢
Big difference between the amount paid for the chocolate bars and the mini cupcakes
= 940 - 800
= 140¢
Small difference between the amount paid for the one chocolate bar and one mini cupcake
= 50 - 40
= 10¢
Number of mini cupcakes
= 140 ÷ 10
= 14
Answer(s): 14
