Caleb Tey's answer to Ari's Primary 6 Maths Fractions Singapore question.

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Caleb Tey
Caleb Tey's answer
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12cm more and after counting, this is 6 more cones.
So each cone is 2cm more.

We need to fill 50cm.
Now = 26cm (9cones)
We need another 24cm (12cone)
Total = 9+12 = 21 cones