Working out surface area of our mats.

How many cubes did this group use?

How would you work out this surface area?

Can you remember the quick way we used to work out this?

How many cubes did this group use?

How could we count the cubes in this mat?

This is the easiest mat to calculate. Why?

Here is Xiarn's mat design.  It is very clever.  He worked out he used -------cubes.

 Toby made a plan of his mat first and then made a model to match.  Can you work out how many cubes he needed to make his mat?  Didn't he do well?caption