Xiao Ming s living room is 5 6 meters long and 4 meters wide, and the floor tiles are paved with how

m = 56 decimetres.

4 meters = 40 decimeters.

The greatest common factor of 56 and 40 is: 2 2 2 = 8

7 5 = 35 (block).

Answer: If you use a floor tile with a side length of 8 decimeters, you need to buy 35 tiles.

The room is 5600 long and 4000 wide, and you can just use 800 800 bricks to pave it, just enough to fill the whole number, and you need to buy 35 pieces and a spare brick.

m = 56 decimeters, 4 meters = 40 decimeters, the maximum common factor of 56 and 40 is 8, so use the side length of 8 decimeters of floor tiles to pave the floor, to meet the conditions of the question, the number of floor tiles is required:

35 pieces.

The area of the living room: square meters).

If the side length of the floor tile is x, a floor tile is required, x a=

0＜x＜√