Xiaofang's bedroom is 3.6m long and 2.8m wide. Now we need to lay square tiles. What is the maximum side length of square tiles? How many decimeters do we need
3.6m=36dm
28m=28dm
The greatest common factor of 36 and 28 is 4
So the maximum side length is 4 decimeters
It needs (36 / 4) x (28 / 4) = 9x7 = 63 pieces
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