A. Convert 2 dm to meters: 2 dm × 0.1 meter/dm = 0.2 meter
Area of one tile = 0.2 m × 0.2 m = 0.04 sq. meter
B. Find the area of the floor:
A = (length) ×(width)
A = (2.8 m) (1.6 m)
A = 4.48 sq. meters
C. Divide the floor area by the area of a tile
4.48 sq meters/0.04 sq meter = numbers of tiles needed
= 112 tiles
112 tiles are needed to cover the floor area.