A barrel of oil weighs 3 / 4 of a barrel. After half of the oil is poured out, there is only 1 / 2 of a kilogram left. How many kilos does the barrel weigh?
3 / 4-2 (3 / 4-1 / 2) = 1 / 4kg
There are four barrels of oil. If 6 kg is poured out of each barrel, the remaining oil in the four barrels is exactly equal to the weight of the original barrel of oil. How many kg is the weight of the original barrel of oil?
To calculate! To calculate
Suppose the weight of oil per barrel is XKG, then 4 (X-6) = X
x=8
A: it used to weigh 8 kg per barrel
RELATED INFORMATIONS
- 1. After two fifths of the oil is poured out, the whole barrel weighs 5.2kg; after three fifths of the oil is poured out, the whole barrel weighs 4kg?
- 2. Two fifths of a barrel of oil is used. The second time, it is 5 kg less than the first time. There are 15 kg left in the barrel. How many kg is the barrel of oil
- 3. A barrel of oil is 2kg, 15 kg of oil is poured out in the first time, 15 kg is poured out in the second time, and there is still oil left in the barrel___ Kilogram
- 4. A barrel of oil weighs 45 kg, and 37% of the oil in the barrel is poured out. The barrel weighs 27 kg______ Kilogram
- 5. A barrel of oil weighs 45 kg, and 37% of the oil in the barrel is poured out. The barrel weighs 27 kg______ Kilogram
- 6. A barrel of oil weighs 21 kg. If you sell 1 / 3 kg, how much is this barrel of oil Wrong, one third sold, 15kg left
- 7. Math problem: a barrel of oil weighs 310 kg, half of which is 160 kg. How many kg does the oil and barrel weigh?
- 8. (grade 4) a barrel of oil is 32kg, half of it is used, and there is still 17kg. How much is the oil? How much is the barrel?
- 9. A barrel of oil, the first time to use two fifths, the second time to use 10 kg, then the remaining oil just accounts for half of the whole barrel of oil How much oil is there in this barrel
- 10. For a barrel of oil, three tenths of it is used for the first time, and 10kg is used for the second time. Two fifths of this barrel of oil is used for the two times, so it's not enough Because the title couldn't be written down, I went on to write it down How many kilos of barrel oil are there? How many kilos are left after two times of use Please write the formula
- 11. For a barrel of oil, the first time you pour 1 / 5, the second time you pour 15 kg, the third time you pour 1 / 3, and there is 8 / 3 kg left. How many kg of this barrel of oil is there No, I'll give him 20 on a first come, first served basis
- 12. 300 kg soybean oil 39 kg, an average of 1 kg soybean oil______ Kilogram, 1 kilogram of oil______ A kilogram of soybeans
- 13. Using 300 kg soybean to extract 39 kg oil, how many kg oil can be extracted from 1 kg soybean on average? How much soybean is needed to extract 1 kg oil?
- 14. It costs 3 yuan and 50 Jiao for one kilogram of pear and one kilogram of apple, 34 yuan for eight kilogram of apple and 11 kilogram of pear, and how many yuan for one kilogram of apple and pear
- 15. What's the result of the comparison between 5 / 3 of a kilogram and 5 / 1 of 3000 grams
- 16. The average weight of parts a, B and C is 31 kg. The weight of parts A is 1 kg less than that of parts B and C, and 2 kg more than that of parts B How many kilos does each part weigh?
- 17. Which weighs a kilogram of cotton or a kilogram of iron? Our teacher said it's the same weight, but I don't think it's right. Think about it. If you put a kilogram of cotton on your hand and another kilogram of iron on your hand, which weight is iron. And the densities of the two are different
- 18. ① 34 ° 25 ′× 3 + 35 ° 42 ′② (180 ° - 91 ° 32 ′ 24 ″) △ 3 specific process, thank you~~
- 19. 1. The maximum factor of a number is 56, the factor of this number is (). Decompose it into prime factor (). 6, decompose 570 into prime factor () 2. The total edge length of a cube is 48CM, its edge length is () cm, its bottom area is () square cm, its surface area is () square cm, and its volume is () cubic cm 3. In order to make a rectangular downpipe, the pipe orifice is a square with a side length of 15cm and a pipe length of 120cm. How many square centimeters of iron sheet is needed? 4. A rectangular vase with a square bottom, if the side of it is just a cube with a side length of 36cm, what is the volume of the vase? 5. Divide by 2, 5, 3, the remainder is 1, the smallest number is () 6. The cuboid is 6cm in length, 4cm in width and 2cm in height. The total length of its edges is () cm. The largest area of the six sides is () square centimeter, the surface area is () square centimeter, and the volume is () cubic centimeter 7. Saw a cube into two cuboids, its surface area increased by 6 square centimeters, then the surface area of the original cube is () square centimeters 8. A cuboid wardrobe, 1.5m long, 1m wide, 2m wide, is painted on its top, front, left and right sides. How many square meters is the painting area at least? 9. A classroom is 10m in length, 6m in width, 4m in height, with an area of 19.6 square meters of doors and windows. To paint the four walls and ceiling of the classroom, if 0.25 kg of paint is used per square meter, how many kg of paint are needed? 3. Questions 4, 8 and 9 need a process. Just give me an answer to the other questions. My sister won't ask me. I'm too lazy to read them,
- 20. Write the least common multiples of the following groups: 18 and 27; 14 and 4; 12 and 16; 15 and 20