Score application questions (detailed process) A pile of 12 tons of sand is divided into three piles. The sum of the masses of the first pile and the second pile is seven and three tenths, and the sum of the masses of the first pile and the third pile is six and five eighths. Q: how many kilograms do the three piles of sand weigh?

The mass of the first pile = seven and three tenths + six and five eighths - 12 = five hundred and fifty-seven of forty - 12 = seventy-seven of forty = one and thirty-seven of forty - the mass of the second pile = seven and three tenths - the mass of the first pile

RELATED INFORMATIONS

1. The score series calculation problem should be simplified, 1 1 1 1 ---------- + ---------- + ----------- +………… +--------------- 1*2*3 2*3*4 3*4*5 98*99*100
2. A few calculation problems, 1.（-5/6）÷（-19/6）÷[1/24×（-5/4）]-0.25÷1/4 2.-1-4/13×[-4-9]×[（-8）+0÷（-1）] 3.-9×4/9÷（-0.8）+4+（-4）-（-9）
3. 1. There is a section of river that needs to be dredged and dredged. At present, there are two dredging companies a and B. if company a does it alone for two days and company B does it alone for three days, it can just complete 25% of all the dredging tasks. If company a does it for four days first, the rest of the dredging work will be completed by company B alone, Then the time taken by company B is just 2 days more than that taken by company a to complete the dredging task alone? 2. A class organizes mountaineering activities. The students are divided into two groups: group A and group B. they march from the foot of the mountain along a road to the top of the mountain at the same time. The time ratio of group A and group B is 2:3 (1) Write directly the ratio of the speed of the two groups (2) When group a reaches the top of the mountain, group B goes to the mountainside a, and the distance from a to the top of the mountain is still 1.2 kilometers. How far is the distance from the foot of the mountain to the top of the mountain (3) On the basis of question (2), set group B to continue climbing from a, and group A to go down the mountain from the original road. The speed of going down the mountain is the same as that of going up the mountain, and meet group B at the hillside B. please put forward a corresponding question according to the above situation, Before giving answers (requirements: ① no other conditions shall be added to the raising of the question; ② the solution of the question must make use of all the known conditions provided by the above situation)
4. 3 practical questions. The questions are in the supplementary column. They should be accurate, 1. Xiao Ming: I bought a morning ticket with a 15% discount Xiao Hua: I bought a ticket for the evening. The ticket price is 50% off The air ticket from city a to city B is 1280 yuan for the whole family. How much is cheaper in the evening than in the morning? 2. The original price of a digital camera is 2500 yuan, but now the price is reduced by 500 yuan. How much discount is it? 3. A certain brand of detergent is 25 yuan per bottle. Aunt Wang is going to buy 12 bottles of this brand of detergent for her company. Which supermarket is more cost-effective? Supermarket a: 25 yuan per bottle, five for one free Supermarket B: 25 yuan per bottle, 15% off
5. Elementary school equation calculation I need 20 equations, like x + 13 = 33. Don't give me hundreds
6. Mathematical application problems, only the formula does not calculate The road repair team built a highway, which accounted for 24% of the total length in the first four days. On the fifth day, it built 80 kilometers a day with the same working efficiency. How many kilometers is the length of the road?
7. Mathematical application problems (formula calculation) (1) One day, 8000 people visit an education website, 2 out of 25 students and 3 out of 40 teachers? (2) There is a round iron sheet with a radius of 20 cm. If 40% of this iron sheet is used, how many square centimeters are left? (3) If the ratio of 7:4 is used to raise carp and crucian carp, the number of fry of carp is 1200 more than that of crucian carp? (4) There are 45 kg apples in basket A. after 1 / 5 of basket a is used and 1 / 7 of basket B is used, the remaining two baskets of apples are the same. How many kg are the apples in basket B?
8. On the application of cylinder and cone Better have more,
9. Application of cylinder and cone The application of cone and cylinder with equal height and volume, the application of cone and cylinder with equal base and volume
10. Ask three practical questions 1. A pool is equipped with an inlet pipe and an outlet pipe. If the inlet pipe is opened only, the empty pool can be filled in 8 minutes. If the outlet pipe is opened only, the full pool can be drained in 12 minutes. Now, if the inlet pipe is opened only 2 minutes later, how many minutes will it take to fill the pool? 2. For a pool, it takes 10 hours to open a water inlet pipe to fill it, 12 hours to open B water inlet pipe to fill it, and 30 hours to open C water outlet pipe to fill a pool. How many hours to open three pipes at the same time to fill the empty pool? 3. A pool can hold 84 tons of water. There are two water injection pipes to fill the pool. The first pipe can fill the pool in 8 hours, and the second pipe can fill the pool in 6 hours. Now the two pipes are opened at the same time. When the pool is filled, how many tons of water can the second pipe fill the pool?
11. Mark application questions (clear process) 1. The ratio of salt to water in one bottle of brine is 1:4, and the concentration of the other bottle of brine is 10%. After mixing two bottles of brine, the concentration is 12%. What is the weight ratio of the two bottles of brine? 2. 200 grams of 10% salt water and 20 grams of 20% salt water are mixed, and the concentration becomes 12%. How many grams of salt water are mixed? 3. When a commodity is sold at its original price, it can make a profit of 25%. Later, when the cost rises, it will raise the price by 20%, and it can only make a profit of 20%. How much does the cost rise?
12. Several calculation problems. Urgent solution. To process Power 2008 of (- 0.25) ×power2009 of (- 4) (2 and 3 / 5 + 1 and 3 / 20) △ 1 and 2 / 3 1 and 1 / 6 + 3 and 1 / 12 + 5 and 1 / 20 + 7 and 1 / 30 + 9 and 1 / 42
13. Three practical problems of mathematics fraction, 1. There are 780 kg of pears and apples in the food store. Three fifths of the apples are sold and 150 kg of pears are sold. At this time, the weight of apples and pears is the same. How many kg of apples are there? 2. From the fourth city to the second city, a car runs 2 / 5 of the whole road in the first hour, and 10 kilometers more in the second hour than in the first hour. At this time, the distance from the second city is exactly 1 / 10 of the whole road. How long is the whole road? 3. Xiao Ming read a story book. On the first day, he read 1 / 4 of the whole book. On the second day, he read 5 pages less than on the first day. There are 30 pages left. How many pages are there in this book?
14. Ask three practical questions and answer them as soon as possible 1. There are five numbers, and their average number is 168. If the five numbers are arranged from large to small, the average of the first three numbers is 108, and the average of the last three numbers is 217. What is the number in the middle? 2. The number a is 240, 25% more than the number B. what is the sum of a and B? 3. There is a fraction, the numerator is 13 smaller than the denominator. If the numerator adds 18, the denominator adds 21, and the score value remains unchanged, what is the original fraction?
15. How to correctly answer the score application questions
16. Application of simple equation in grade five The simplest
17. The Sixth Grade 100 must have the answer computation question
18. Answer to 100 practical questions in Grade 6
19. (fill in the blanks) and practical questions 1. This year's wheat output is 10% higher than that of last year. This year's wheat output is equivalent to () percent of last year's 2. The original price of a product was 200 yuan per piece. After the price increased by 20%, it decreased by 20%. Now the price of each piece is () yuan 3. For a bucket of pesticide, 34 kg is taken out for the first time, 5% is taken out for the second time, and 30% is left. How many kg is this batch of pesticide,
20. Mathematical problems, application problems, formulation and calculation, to write the process clearly There is a clock. The minute hand is 8cm long. This minute hand has been walking for 45 minutes. How many cm does the needle tip travel?