Mei Ling paid $96 for 8 art classes. At this rate, how much will she pay for 15 art classes?
- $12
- $180
- $1440
- $120
Need a hint?
First find the cost of one class by dividing the total cost by the number of classes. Then multiply by the new number of classes.
Worked answer
- Find the cost of 1 art class: $96 ÷ 8 = $12
- Find the cost of 15 art classes: $12 × 15 = $180
Answer: $180
The mistake this question tests
Habit
Calculation slip
Pupils might multiply $96 by 15 directly, forgetting to first find the cost for one class.
How to fix it at home →Wrong answers children often give:
- $1440 Calculation slip
- $12 Calculation slip
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