Calculate ceramic tile dosage, 4 meters, know room floor area, wall area how to calculate? What formula is the most standard?

(perimeter x height - door and window area) * 1.08, about 8% loss
About 5% loss on the ground

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1. How many tiles do you need to use if you want to use a 6-decimeter-long square tile for your room? How many tiles do you need if you want to use a 12 decimeter square tile instead
2. Xiao Li's new home is 80 decimeters long floor tiles to lay the ground, which needs 200 pieces. If you use square tiles with an area of 1 square meter to lay the floor, how many pieces do you need? What's the area of the house? Why 128 yuan, 130 square meters,
3. How many floor tiles does it take to build 146 square houses with 80 by 80 cm floor tiles
4. What is the concept of floor tile 800X800? How much square is 800X800?
5. 800X800 ceramic tile is 50 yuan each, with an area of 70 square meters
6. A swimming pool is 80 meters long, 30 meters wide and 3 meters deep. How many tiles do you need if each tile is 3 square decimeters
7. How many 80 * 80 (CM) tiles are needed for 400 square meters?
8. How to calculate floor tiles
9. Excuse me next, ceramic tile specification is 80 × 80 floor tile, the price is 50 yuan a piece of brick, excuse me a square how much money. How to calculate, write a formula, thank you
10. How to calculate the number of floor tiles in a house The house needs to be paved with floor tiles. It has a house plan. It knows the length of all aspects and how to calculate how many bricks the house needs,
11. Why is the indoor budget calculated? For example, the floor area of a room is directly multiplied by a quotation to count 600 * 600 floor tiles
12. How to calculate how many tiles a room needs?
13. How to calculate the floor tile for the room area
14. If the area of the room is 15 square meters, how many square meters are the floor areas of the two kinds of floor tiles
15. =There are 1760 pieces of blue and white tiles in total. 60% of blue tiles and 514 pieces of white tiles are used. There are as many tiles left. How many of the two tiles are there To solve the equation
16. Black brick has 20, white brick has 40, the area of this room is 15 square meters, ask the area of two kinds of floor tile? The floor of a room is paved with black and white tiles. There are 20 black tiles and 40 white tiles. If the area of the room is 15 square meters, what are the areas of these two kinds of floors?
17. The floor of a room is made of two colors of floor tiles. There are 40 white floor tiles and 20 black floor tiles (1) write out the floor area ratio of two kinds of floor tiles and simplify them. (2) if the area of the room is 15 square meters, how many square meters are the floor areas of the two kinds of floor tiles?
18. A rectangular wood block is cut off 2DM from the top and 3DM from the bottom, and the rest is just a square. The known cut-off area is 120 square decimeters. Calculate the volume of the original cuboid
19. There is a rectangle. If its width is reduced by 2 mm or its length is reduced by 3 DM, its area will be reduced by 24 square decimeters. What is the original area of this rectangle?
20. A rectangular piece of glass, 5 decimeters long, 3 decimeters wide, the remaining part is a square. Known cut area is 71 square decimeters, then the remaining square area is______ Square decimeter