A batch of rectangular floor tiles is 18 cm long and 12 cm wide. How many such tiles do you need to make a square?

Only less than 6 tiles can be put together into a 36 cm square

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1. It takes 520 pieces to lay a square with a side length of 25 cm. Now, how many pieces of rectangular tiles with a side length of 20 cm and a width of 10 cm are needed to lay the same piece of land?
2. With 80 cm long, 60 cm wide tiles into a square, square area at least how much
3. With a number of 80 cm long, 60 cm wide tiles, paved into a square, at least how many such tiles?
4. Four identical rectangular floor tiles and square floor tiles with side length of 60 cm are laid into a large square with length of 80 cm. Calculate the length and width of rectangular floor tiles kuai kuai jijijijijiji
5. The side length of a square tile is 80 cm. What is the area of this tile? A rectangular square 100 m long and 80 m wide is paved with bricks At least how much?
6. The floor is 80 decimeters long and 60 decimeters wide. From the point of view of never wasting materials, you can choose the square floor tile with the side length of how many decimeters? It is more appropriate to choose the floor tile with the side length of how many decimeters? Tell me your reasons
7. The swimming pool of a school gymnasium is 50 meters long, 20 meters wide and 1.2 meters deep. How many tiles are needed to paste 0.16 square meters of tiles on the red wall and the bottom of the pool
8. A cuboid children's swimming pool is 40 meters long, 14 meters wide and 1.2 meters deep. Now, how many square tiles with an area of 0.16 square meters should be pasted on the four walls and the bottom of the pool
9. A cuboid children's swimming pool is 40 meters long, 14 meters wide and 1.2 meters deep. How many pieces of square tiles with an area of 0.16 square meters need to be pasted on the four walls and the bottom of the pool?
10. A cuboid swimming pool is 20 meters long, 5 meters wide and 2 meters deep. Now put cement on each side of the pool first, and then stick ceramic tiles with a length of 4 decimeters. How many tiles do you need? If you use 5000 grams of cement per square meter, how much cement do you need? It's due tomorrow. Thank you
11. Judgment question: use 30 cm long and 20 cm wide rectangular floor tiles to lay a square floor tile. At least 600 such tiles should be used
12. Use 8 identical rectangular floor tiles just to form a rectangular pattern with a width of 20 cm, so how many square centimeters is the area of each rectangular floor tile?
13. As shown in the figure, the rectangular pattern with a width of 50cm is made up of 10 identical small rectangles. What are the length and width of each rectangle?
14. Eight identical small rectangular tiles are assembled into a large rectangular floor to calculate the area of the large rectangular floor
15. The rectangular ABCD with an area of 1.6m2 is made of 10 identical rectangular floor tiles (as shown in the figure). What is the perimeter of the rectangular ABCD?
16. In square ABCD, f is the midpoint of AD, BF and AC intersect at point G, what is the area ratio of triangle BGC to quadrilateral CGFD
17. In rectangular ABCD, if f is the midpoint of AD and BF and AC intersect point G, the area ratio of triangular BGC to quadrilateral CGFD is
18. In square ABCD, f is the midpoint of AD, BF and AC intersect point G, then the area ratio of triangle BGC and quadrilateral CGFD is? How to write the correct procedure?
19. In square ABCD, f is the midpoint of AD, BF and AC intersect at point G, then the area ratio of triangle BGC to quadrilateral CGFD is
20. In the parallelogram ABCD, ab ∥ CD, ad ∥ BC, e and F are on AD and CD respectively, and CE = AF. CE and AF intersect at point P, and In the parallelogram ABCD, ab ∥ CD, ad ∥ BC, e and F are on AD and CD respectively, and CE = AF, CE and AF intersect at point P, and Pb bisection ∠ APC is proved