don steward
mathematics teaching 10 ~ 16

Thursday 5 April 2012

factor trees

nudging towards the fundamental theorem of arithmetic
(and maybe to provide a reason why 1 is not considered to be a prime number any longer)
this can be done with or without this sheet
[e.g. pose the task of finding all the ways that 90 can be broken down]

what are the missing products?

factor trees drawn by students in Y5 at the International School of Toulouse
see pinkmathematics
what are the missing numbers?

find a way to break down 720 into a product of prime factors that fits this tree:

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