don steward
mathematics teaching 10 ~ 16

Tuesday, 11 March 2014

harder cuboid surface area questions

can involve linear equations, unknown on both sides

and a quadratic equation (9 and 10)
involves quadratic equations, some with a lead coefficient greater than 1

on the first sheet, question 12 is demanding....

an intention might be for students to try out the various multiples of 10, form an equation and solve it

there is a slightly more algebraic approach:

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