How much is the sixth grade math problem 39 times 3 / 26 What's eight times seven out of twelve

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• 1. 1. 6 points (1) a batch of parts were produced, 200 pieces per day, completed in 15 days. In fact, 250 pieces per day were produced. How many days can they be completed? (expressed in proportion) (2) a cone-shaped sand pile has a bottom area of 18.84 square meters and a height of 0.5 meters. If the sand weight per cubic meter is 1.6 tons, how many tons does the pile weigh? (3) if a cylinder and a cone are of equal height and equal bottom, and the volume of the cylinder is 120 cubic centimeters, how many cubic centimeters more is the volume of the cylinder than that of the cone? 2. The tractor factory produced 850 large tractors in the first three months of this year. According to this calculation, how many tractors can be produced in the whole year? (answer to the same proportion method) (5 points) 3. The utility model relates to a cylindrical tin bucket without a cover, with a bottom diameter of 4 decimeters and a height of 6 decimeters? 4. A room, with the side length of 2 decimeters of floor tiles, need to use 144 pieces, if use the side length of 3 decimeters of floor tiles, how many pieces? 5. A cylindrical iron block with a bottom radius of 4 decimeters and a height of 6 decimeters is melted and cast into a cylinder with a bottom radius of 3 decimeters What's the height of this cone? 6. After a basket of apples is sold, another 6 kg is sold. At this time, the weight sold is just the rest. How many kg is the basket of apples? (4 points) 7. A rectangular block of wood, 8 in width and 6 in height, is cut into the largest cylinder. What is the volume of this cylinder in cubic decimeters? (3 points)
• 2. The wooden table in Hongqi shopping mall is priced at 20% of the profit. As a result, it is sold at a 20% discount, with a loss of 32 yuan per table. What is the purchase price of this kind of wooden table?
• 3. If there are n numbers greater than 0, their average decimal point will be equal to the sum of these numbers after moving one place. How much is n? In which direction will the decimal point move? What's the formula
• 4. There are 9 Cards in a box, and there are numbers 1 to 9 on the cards. If two cards are randomly drawn out from the box, and the first card is drawn out, it needs to be put back into the box before the second card is drawn out, and the probability that the product of the extracted numbers is even is calculated There's a way I don't understand why it's not right. Please analyze it by an expert - one of the two must be even, and the other odd or even. Why can't we assume that (the probability of getting odd or even) is 1, and then set 1x4 / 9 (the probability of getting even) X2 (the order)?
• 5. Small math problem, urgent~~~~ You don't have to talk about it in detail. You need to calculate the formula. You can talk about it! 1. A, B and C went to travel. A bought three bottles of coke, B bought two bottles of coke, and C didn't buy them. The three drank five bottles of coke on average. In order to bear the cost on average, how much should c give a if C took out five yuan? 2. My mother bought a bicycle for Xiao Liang. The price of Changfa supermarket, Dongfeng supermarket and shopping center is 230, but the price has changed due to the promotion in summer vacation Changfa Supermarket: 20% discount for all products Dongfeng Supermarket: 50 yuan for free when shopping at 200 yuan Shopping center: 10% off for all goods, 10 yuan free for bicycles over 100 yuan Where is the best place to buy? 3. There is a square cardboard. Cut a rectangle 3 decimeters wide from one side, and the area of the rectangle is measured to be 15 square decimeters. The remaining part needs to be cut out of the circle with the largest diameter. What is the area of the circle? How many can be cut out?
• 6. A little math problem The price of a commodity after 60% discount is 30. How much is the original price?
• 7. 39 by 37 / 38 + 37 by 1 / 38
• 8. 36 + 37 + 38 + 39 +. + 50 = how much?
• 9. 39 degrees 48 points + 41 degrees 37 points 39 degrees 48 points + 41 degrees 37 points= 52 degrees 19 minutes 12 seconds = how many degrees 90 degrees 17 minutes - 47 degrees 52 minutes 2 seconds= 25 degrees 36 minutes * 4= 48 degrees 2 minutes / 5= It's the degree of the angle~
• 10. Simple calculation: 39 / 38 times 37 is equal to? Please write down the process and give your ideas
• 11. Now the price of a drug is 56.10 yuan per box, which is 15% lower than the original price. How much is the original price?
• 12. 1 4 15 56 what's the next number?
• 13. Three tens, nine tenths, two thousandths
• 14. Reduce 300 to 0.3? 26.4 to 1%? In a hurry in a hurry
• 15. There are () thousandths in 0.078, and 5 percentiles are expressed as decimal ()
• 16. After reducing a number to one percent of the original number, the number obtained is 8.91 smaller than the original number. What is the original number?
• 17. The quotient of dividing two numbers is 4.35. If the divisor is expanded 10 times and the divisor is reduced to one percent of it, what is the quotient?
• 18. First, increase a number by 10 times, then reduce it to one percent, and then increase it by 1000 times to get 35.8. What was the original number?
• 19. When we expand a number to 10 times of its original value, then reduce it to one hundredth, and then reduce it to one tenth, the result is 0.002?
• 20. What's the difference between reducing a number by one percent and reducing it by 100 times