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There are 2 skills that are tested.

  1. Working backwards, most students should be fine with this as this is explicitly covered in schools
  2. Simplifying the problem by assuming Kelvin receives 680 cards at first so that all the units are accounted for. This can be trained by effective model drawing. 

Follow us on FB so that you can watch us demonstrate effective model drawing to aid your child. 

https://www.facebook.com/anthony.chang.16906

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