156 liters of water were injected into a cuboid pool, and the water surface rose by 4 decimeters. The bottom area of the pool was calculated

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• 1. A cuboid pool, the bottom is 12 decimeters long and 6 decimeters wide. If you want to inject 2 decimeters of water into the pool, how many liters of water do you need?
• 2. 15 km = cm = mm; 3.2 μ M = m; 880 mm = nm; 250 L = cm2; 0.5 m3 = cubic decimeter = cubic centimeter; 3 hours = seconds = minutes
• 3. How many rational terms are there in the expansion of binomial (x ^ 2 + 1 / x) ^ 10 (x ^ 2 + 1 / x ^ 10 is not connected in the middle under the third root sign.)
• 4. If any term is taken from the expansion of binomial (x + 1) 10, the probability that the coefficient of the term is odd is () A. 211B. 311C. 411D. 511
• 5. 2x^5-5x^4-11x^3+23x^2+9x-18 Factorization
• 6. Integer solution of equation 5x + 10Y = 14 Don't tell me you can't solve it. As long as it's an integer, it doesn't matter if you use a negative number Make the following question Integer solutions of equation 13X + 30y = 4
• 7. (1) 5x + 3Y = 52 (2) 11x + 5Y = 81 for solving quadratic equations of two variables
• 8. Use factorization to solve the equation: 1. X ^ 2-11x + 28 = 0 2.2 √ 3Y ^ 2-y - √ 3 = 0. When x =?, the value of the algebraic formula x ^ 2-5x + 1 is equal to 15
• 9. Solution: 5x + 30 = 3Y, 11x = 15x + 144, x = y= emergency
• 10. Who would ask for 5x-y = 120, 3y-11x = 120?
• 11. The bottom of a cuboid pool is 12 decimeters long and 6 decimeters wide. If you want to inject 2 decimeters of water into the pool, how many liters of water do you need? Tell the algorithm
• 12. The bottom of a rectangular tank is 8 decimeters long and 4 decimeters wide. It is known that there is 80 liters of water in the tank. What is the depth of water in the tank?
• 13. A cuboid pool, 4 meters long and 3.5 meters wide, can hold 10.85 cubic meters of water. How deep is the pool?
• 14. There is a cube iron block with an edge length of 80 cm. Now we need to melt it into a cuboid with a cross-section area of 2000 square cm. How long is it
• 15. A cube 40 cm long is filled with water, and then a little water is poured into a cuboid pool 80 cm long and 20 cm wide. How deep is the water
• 16. Fill a square water tank 40 cm long with water, and then pour the water into a cuboid water tank 80 cm long and 20 cm wide. How deep is the water
• 17. Pour 50 liters of water into a square empty pool with an edge length of 5 decimeters______ Decimeter
• 18. Then, the wastewater from a cuboid wastewater tank with a length of 2 × 10 & # 179; DM, a width of 4 × 10 & # 178; DM and a height of 80dm is injected into a cube reservoir. It is known that the edge length of the cube reservoir is 5x10 & # 178; DM. Can these wastewater be injected into the reservoir for purification at one time? Explain the reason
• 19. Unit conversion 0.2m=____ CM=____ Mm 50g=______ Kg 0.2 H=____ Minutes=_____ 50 ml per second=______ cubic metre
• 20. 0.46 m3 = how many ML