Madam Lim's bookshop packed 840 activity books equally into cartons of 8 books. After selling all the cartons, the bookshop collected $1,575. What was the selling price of each carton?
Need a hint?
Find the number of cartons first. Then use the total amount collected to find the price of one carton.
Worked answer
- 840 ÷ 8 = 105 cartons
- $1,575 ÷ 105 = $15 for each carton
The mistake this question tests
Calculation slip
A pupil may divide $1,575 directly by 8, confusing the number of books in each carton with the number of cartons sold.
How to fix it at home →Wrong answers children often give:
- $196.875 Calculation slip
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See the answer →Practise PSLE whole numbers until the mistakes stop.
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