Faith Ng's answer to OMG's Primary 6 Maths question.
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hello! try to draw a model. since a pen costs twice as much, 1 ruler would be 1 unit and 1 pen would be 2 units. draw out the model of 2 rulers and 5 pens, you get 12 units. find one unit and that would be the price of 1 ruler.
Date Posted:
7 years ago
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