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: