To lay bricks on the ground with a length of 5 meters and a width of 3 meters, there should be one or two kinds of floor tiles; a square with a side length of 40 cm and a square with a side length of 50 cm 1. How many pieces of these two kinds of floor tiles do you need at least? 2. If the small tiles cost 605 yuan each, and the large tiles cost 7.2 yuan each, how many yuan do you need to use them to pave the floor?

To lay bricks on the ground with a length of 5 meters and a width of 3 meters, there should be one or two kinds of floor tiles; a square with a side length of 40 cm and a square with a side length of 50 cm 1. How many pieces of these two kinds of floor tiles do you need at least? 2. If the small tiles cost 605 yuan each, and the large tiles cost 7.2 yuan each, how many yuan do you need to use them to pave the floor?

5 meters x 3 meters = 15 square meters 0.4 meters x 0.4 meters = 0.16 square meters (40 cm = 0.4 meters) 15 square meters / 0.16 square meters = 93.75 should be 94 (pieces) - small floor tiles 0.5 meters x 0.5 meters = 0.25 square meters 15 square meters / 0.25 square meters = 60 (pieces) - large floor tiles (small floor tiles should be 6.05 yuan?) 6.05 yuan x 94 = 56