Ruth Sin's answer to riz's Primary 5 Maths Whole Numbers Singapore question.
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Use the extra amount to find 1 unit of wrong amount.
(Supposed to divide the cost by 4 but it got divided by 3 instead. But 4 girls paid! So the extra $2.40 that each of the 4 girls paid makes up the extra "4th unit".)
(Supposed to divide the cost by 4 but it got divided by 3 instead. But 4 girls paid! So the extra $2.40 that each of the 4 girls paid makes up the extra "4th unit".)
Date Posted:
4 years ago
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