Elijah bought a total of 11 mochi balls and chocolate bars. Each mochi ball cost 40¢. Each chocolate bar cost 90¢. He paid a total of $8.90. How many chocolate bars did he buy?
Number of
mochi balls |
Amount paid
for the mochi balls |
Number of
chocolate bars |
Amount paid
for the mochi balls |
Total paid |
| 11 |
11 x 40
= 440¢ |
0 |
0 |
440¢ |
| 10 |
10 x 40
= 400¢ |
1 |
1 x 90
= 90¢ |
490¢ |
| 2 |
2 x 40
= 80¢ |
9 |
9 x 90
= 810¢ |
890¢ |
$1 = 100¢
$8.90 = 890¢
Amount paid if all were mochi balls
= 11 x 40
= 440¢
Big difference between the amount paid for the mochi balls and the chocolate bars
= 890 - 440
= 450¢
Small difference between the amount paid for the one mochi ball and one chocolate bar
= 90 - 40
= 50¢
Number of chocolate bars
= 450 ÷ 50
= 9
Answer(s): 9
