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

(45 * 2) *

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1. 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
2. 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
3. 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?
4. 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
5. 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?
6. 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?
7. 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
8. 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?
9. 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
10. 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?
11. 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?
12. How many floor tiles do you need to make a square with a rectangular floor tile 45 cm long and 30 cm wide?
13. Use side length (whole decimeter)______ Decimeter______ Decimeter______ Decimeter square can be just covered with 16 decimeter long, 12 decimeter wide rectangle
14. Use a rectangular tile that is 8 decimeters long and 6 decimeters wide to pave the floor. To pave a square, how many decimeters is the side length of the square at least? How many tiles were used?
15. Use side length (whole decimeter)______ Decimeter______ Decimeter______ Decimeter square can be just covered with 16 decimeter long, 12 decimeter wide rectangle
16. The floor of a room is rectangular. If all the floors are paved with square tiles, what is the maximum side length of the square tiles? (1) How many tiles are needed to cover the floor of this room? (2) Note: (1), (2) divided into title number, pay attention to the unit, to the process! 4.8m long 4.2m wide
17. A rectangular floor tile is 24 cm long and 18 cm wide. How many floor tiles do you need to make a square with this kind of floor tile
18. A kind of rectangular floor tile is 30 cm long and 15 cm wide. At least how many such tiles can be paved into a solid square?
19. The first question: a kind of rectangular floor tile is 24 cm long and 18 cm wide. How fast does it take to make a square floor with this kind of floor tile? The second question: a class of students do exercises, 10 people in a row, 8 people in a row are just finished, this class at least how many students? (please write quickly, I want to do the problem) How about a common multiple?
20. The floor of a shopping mall hall is a rectangle with a length of 16m and a width of 24m. If you want to use square tiles with a side length of 80cm to cover the floor of the whole hall, At least how many such tiles are needed?