The floor of the room is a rectangle, 5 meters long and 4 meters wide. How many tiles are needed to lay 40 cm long and 25 cm wide? How much?

200 yuan

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1. In a room with an area of 21 square meters, the floor tile is 2 / 5m in length and 3 / 10m in width. How many bricks do you need to fill the room?
2. Mr. Li's new house is decorated. The living room is ready to be paved with floor tiles. The area and quantity of floor tiles are as follows, Area of each floor tile / m2: 0.20.30.40.60.8 Number of floor tiles required: 600 400 300 200 150 1. If the area of each floor tile is 0.5 square meters, how many floor tiles do you need to pave the living room? (write the formula) 2. 500 bricks were used for this living room. What is the area of each brick? (write the formula)
3. If a room is paved with 16 square centimeter square bricks, it needs at least 150 pieces. If it is paved with 5 cm square bricks, how many pieces at least (answer with comparison)
4. The area of floor tile is fixed. Who changes the area of floor tile and the number of tiles? Original question: the area of the bottom of the house remains unchanged, and the number of tiles is inversely proportional to the area of each tile
5. To pave a room with floor tiles, if you use 60 cm square bricks, you need 350 pieces. If you use 1 m square bricks, how many pieces do you need?
6. Four identical rectangular floor tiles and a square floor tile with a side length of 60cm are laid into one side Four identical rectangular floor tiles and a square floor tile with a side length of 60cm are laid into a large square with a side length of 80cm, and the length sum of the rectangular floor tiles is determined
7. To 3.2 meters long and 4.8 meters wide living room floor tiles. There are two kinds of square tiles on the market with side length of 60 cm and 80 cm. Which one is suitable?
8. To the length of 6.4 meters. 4 meters wide rectangular living room floor tiles. There are two kinds of square tiles on the market with side length of 60 cm and 80 cm. Which one is suitable?
9. Dad wants to pave the floor tiles for the living room. If you choose the floor tiles with 60cm side length, you need 125 pieces. 1. How many pieces do you need if you use the floor tiles with 100cm side length
10. Xiao Ming's living room, which is 6 meters long and 4.5 meters wide, needs to be paved with floor tiles. There are 40 cm and 30 cm floor tiles. Which one is suitable? How much
11. A room is 40 decimeters long and 32 decimeters wide. How many such tiles do you need to lay the largest square tiles on the floor?
12. A conference room is 52 decimeters long and 36 decimeters wide. Now it needs to be paved with square tiles. How many decimeters is the minimum side length of the tiles? How many tiles do you need?
13. 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
14. A bedroom is 40 decimeters long and 28 decimeters wide. Now it needs to be paved with square tiles. Try not to damage the whole tile to pave the floor. The side length of square tiles is the largest What's the decimeter
15. A conference room is 52 decimeters wide and 36 decimeters wide. Now it needs to be paved with square tiles. The maximum side length of square tiles is______ Decimeter, a total of such tiles______ Block
16. Use the same size square to turn the floor of a bedroom. The floor is 42 decimeters long and 36 decimeters wide. Use this kind of floor tile to spread along the length or width, which is just right What's the maximum side length of this kind of geostrophic machine
17. There are two design schemes for the floor tiles in the toilet. Scheme 1: the floor tiles with a square side length of 2 decimeters are 8 yuan each Plan 2: rectangular floor tiles are 3 decimeters long and 2 decimeters wide. Each tile costs 6 yuan. The second plan uses 540 yuan to calculate the area of the toilet. Which design is cheaper?
18. There are two design schemes for the floor tiles in xiaohongjia kitchen. The second scheme is 3 decimeters long and 2 decimeters wide. How many floor tiles does the second scheme need? How much yuan does it cost? There are two design schemes for Xiaohong's bathroom to be paved with floor tiles. The second scheme is rectangular, with the length of 3 decimeters and the width of 2 decimeters. How many floor tiles does the second scheme need? How many yuan? How to do it
19. There are two designs for Xiaoming's living room to be paved with floor tiles. (1) in the first design, 300 floor tiles are used to calculate the area of the kitchen, i.e. how many square meters and how many square meters? The first design is a square with 3 yuan each and 2 decimeters on each side
20. How many small cubes do you need to make a big cube with the edge length of 1 decimeter?