median
don steward
mathematics teaching 10 ~ 16

Saturday, 11 February 2012

same and transformed

much of algebra work might helpfully focus on constructing either equivalent (same but look different) or transformed statements

one important appreciation seems to be that the adding/subtracting changes just one part of an expression whereas multiplying/dividing changes the whole expression

these tasks intend to focus on these aspects

students are asked to consider (maybe in pairs) why the expressions are the same as the one in the centre

what has happened to the centre expression?

































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