The side length of large tiles is 4 decimeters, and that of small tiles is 3 decimeters. The floor of a room is paved with large tiles, with 6 rows of 24 tiles in each row, How much will it cost

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• 1. Xiaohua's room is 5.1 meters long and 3 meters wide. How many pieces do you need if you use 30 cm square tiles?
• 2. Xiaofang bought a new house, ready to lay tiles, his house is 85 square meters, tiles are 30 cm square, how many tiles do you need at least? What is the area of a piece?
• 3. To replace the floor tiles for the room, we used to use square tiles with a side length of 15 cm, a total of 1000 pieces. Now we need to replace them with large square tiles with a side length of 25 cm, which needs to be replaced How many such tiles?
• 4. The area of Xiaowen's room is 10.8m2. The floor of the room happens to be paved with 120 identical square tiles. What is the side length of each tile?
• 5. The area of Xiaowen's room is 10.8m2. The floor of the room happens to be paved with 120 identical square tiles. What is the side length of each tile?
• 6. In a room with an area of 12 m2, lay a square floor tile with a side length of 14 cm. How many such tiles do you need at least? Why do you do this?
• 7. Lay 14cm square floor tiles in a room with an area of 12 m2. How many such tiles are needed
• 8. During the promotion period of a shopping mall, it is stipulated that all goods in the shopping mall are sold according to 80% of the price. When customers spend a certain amount of money in the shopping mall, they can get the corresponding amount of lottery tickets according to the following scheme. (lottery shopping no longer enjoys preferential treatment) the price is x (yuan) 100 ≤ x < 200200 ≤ x < 400400 ≤ x < 600 The amount of lottery ticket (yuan) 50100150 If the price of the goods Mr. Hu bought in the shopping mall is 450 yuan, what is the discount______ Yuan
• 9. Fill in the blanks In the line segment between two parallel lines, () the line segment of two parallel lines is the shortest; the length of these two line segments is called the distance between parallel lines
• 10. It is known that a two digit ten digit number is one less than a single digit number. If the ten digit number is exchanged with a single digit number, the product of the new two digit number and the original formula is 405 more than the square of the original number, and the original number is——————
• 11. To pave a room with a length of 9 meters and a width of 6 meters, how many decimeter square floor tiles are suitable? How many pieces are needed?
• 12. There is a room that needs 700 pieces of square tiles with a side length of 2 decimeters. If you use square tiles with a side length of 2.5 decimeters, how many pieces do you need
• 13. There are a batch of bricks, each of which is 45 cm long and 30 cm wide. At least how many such bricks can be used to make a square?
• 14. There are a batch of bricks, each of which is 45 cm long and 30 cm wide. At least how many such bricks can be used to make a square?
• 15. There are a number of floor tiles, each 45 cm long and 30 cm wide. At least how many such tiles can be used to make a square
• 16. A kind of rectangular floor tile is 36 cm long and 24 cm wide. How many floor tiles do you need to make a square with this kind of floor tile? What's the area of a square?
• 17. There is a rectangular floor tile 48 cm long and 28 cm wide. If you cut it into a square with the same side length and area, there is no surplus. How many pieces can you cut at least? If you use it to pave a square floor, how many such tiles are needed at least
• 18. There is a 48 cm long, 28 cm wide rectangular floor tile, if you use it to lay a square floor, then at least a few pieces The teacher said it wasn't 84
• 19. A kind of rectangular floor tile, 45 cm long and 30 cm wide. How many floor tiles do you need at least to make a square
• 20. There is a rectangular floor tile, each 45 cm long, 30 cm wide, at least how many such floor tiles can be paved into a square?