Priscilla Ng's answer to Simon's Primary 5 Maths Fractions Singapore question.
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The exchanged happened among the 3 boxes without any external amount of sand being added or taken away, therefore the amount of sand in them remained the same.
At the end, their total is still 360 g.
Hence, each has 120 g at last,
From this amount, we work backwards to what was the amount in each box at first.
At the end, their total is still 360 g.
Hence, each has 120 g at last,
From this amount, we work backwards to what was the amount in each box at first.
Date Posted:
1 year ago
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