Ivan bought a total of 23 chocolate bars and sweets. Each chocolate bar cost 40¢. Each sweet cost 50¢. He paid a total of $9.80. How many sweets did he buy?
Number of
chocolate bars |
Amount paid
for the chocolate bars |
Number of
sweets |
Amount paid
for the chocolate bars |
Total paid |
| 23 |
23 x 40
= 920¢ |
0 |
0 |
920¢ |
| 22 |
22 x 40
= 880¢ |
1 |
1 x 50
= 50¢ |
930¢ |
| 17 |
17 x 40
= 680¢ |
6 |
6 x 50
= 300¢ |
980¢ |
$1 = 100¢
$9.80 = 980¢
Amount paid if all were chocolate bars
= 23 x 40
= 920¢
Big difference between the amount paid for the chocolate bars and the sweets
= 980 - 920
= 60¢
Small difference between the amount paid for the one chocolate bar and one sweet
= 50 - 40
= 10¢
Number of sweets
= 60 ÷ 10
= 6
Answer(s): 6
