median
don steward
mathematics teaching 10 ~ 16

Tuesday, 28 February 2012

clouds

start with a set of expressions where the 'unknown' is a cloud (John Mason advocates this)
invite students to read the expressions
then put all of them = 16 and ask them to try to work out what the (cloud) number is
then pose some harder questions (this involves all the digits 2 to 7 - can students create similar equations involving consecutive numbers?)

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