There are four fifths of apple orchards in Xingfu village, accounting for two fifths of the total area of orchards. How many hectares are there?

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• 1. How many thousand square kilometers is Asia
• 2. Jiangsu Province covers an area of 102600 square kilometers, and Shanghai covers an area of 634000 square kilometers Jiangsu Province covers an area of 102600 square kilometers, and Shanghai covers an area of 634000 square kilometers (1) What percentage of the area of Jiangsu Province is that of Shanghai? Formula__________________________ (2) What percentage of the area of Jiangsu Province is Shanghai? Don't copy the answer. I feel like the answer is wrong, especially 3 and 4. I can't understand it. It's better to have a detailed explanation (3.4) Formula__________________________ (3) How much more is the area of Jiangsu Province than that of Shanghai? Formula__________________________ (4) How much less is the area of Shanghai than that of Jiangsu Province?
• 3. The area of Jiangsu Province is about 100000 square kilometers, and that of Anhui Province is about 150000 square kilometers (1) How much is Anhui Province larger than Jiangsu Province? (2) How much smaller is Jiangsu Province than Anhui Province?
• 4. Know how to calculate the surface area, width and height of a cuboid
• 5. A cuboid fish tank is four fifths of a meter long and two fifths of a meter wide. It contains sixteen fifths of a cubic meter of water. How deep is it?
• 6. A cuboid fish tank is 910m long and 45m wide. There is 925m3 water in it. How deep is it?
• 7. A cuboid fish tank is nine tenths of a meter long and four fifths of a meter wide. It contains nine fifths of a cubic meter of water. How deep is it?
• 8. If you put a rectangular glass fish tank with a length of 4 decimeters and a height of 4 decimeters into a rectangular iron block with a length of 2 decimeters, a width of 4 decimeters and a height of 2 decimeters (1) If it's full of water, how many liters will it overflow? (2) If the original water depth 3. Will the water overflow? If so, how many liters will it overflow? (3) What is the maximum depth of water in order to keep the water from overflowing?
• 9. A cuboid glass fish tank is 6 decimeters long and 5 decimeters wide. There is water in the tank, and the water surface is 1 decimeter away from the upper edge of the tank. If a square iron block with 3 decimeters long is put into the tank, will the water overflow? Why?
• 10. There is a cuboid fish tank, 8 decimeters long, 6 decimeters wide, 4 decimeters deep, It is helpful for the respondent to give an accurate answer. Pour the water into a container with a length of 5 decimeters and a width of 2 decimeters. The water will not overflow. How many decimeters is the water depth? Determinant
• 11. How many square meters is nine square kilometers
• 12. How many square meters is 235.9 hectares
• 13. How much less is three fifths meter than 0.75 meter? How much more is 0.75 meter than three fifths meter?
• 14. If a ball falls from a height of 100 meters, it will bounce up 2 / 5 of the previous height How many meters is the first bounce? Answer with scores
• 15. If a ball falls from a height of 100 meters, how many meters does it bounce for the third time?
• 16. When a ball falls freely from a high place, the bounce height after each contact with the ground is two fifths of the previous drop height. If it falls from a height of 100 meters, then (next to the front one) how many meters did it bounce for the third time?
• 17. 4 / 5 ha = () m2
• 18. () 3 hectares = (7 hectares)
• 19. How many hectares are three fifths of four square kilometers
• 20. How many tons are three fourths of ten tons, how many hectares are one fourth of two fifths of a hectare, and how many hectares are three fifths of five fifths of a hectare