See Qingwen Lu's answer to Heidi's Primary 6 Maths question

Qingwen Lu's answer to Heidi's Primary 6 Maths question.

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Date Posted: 6 years ago

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Heidi

6 years ago

Because there is a point that I still don't understand. How should I know '5 units = 20 red pens'? I really appreciate the answer that I still a bit confuse. Could you please explain more?