(1) There are seven more boys than girls in one class.

(2) The number of basketball is four times that of football.

(3) Pear trees 15 are three times more than apple trees.

(4) It costs more to buy three pens than five ballpoint pens 1.5 yuan.

(5) Two equal-length iron wires, one in a square and the other in a circle.

2. 100 kg rapeseed can extract 40 kg oil. According to this calculation, how many kilograms of oil can be extracted from 15 tons of rapeseed?

3.200 1 Statistics of automobile sales in Honghe automobile trading market in the first half of the year.

(1) Fill in the blanks in the form with data;

(2) Average monthly sales in the first half of the year () vehicles;

(3) Compared with the first quarter, the second quarter increased by ()%.

4. There are 1336 students in Chengguan Middle School. As we all know, the ratio of boys to girls is 5: 3. How many boys and girls are there?

5. The circumference of a circular flower bed is 3 1.4m, and 40% of the land in the flower bed is planted with Chinese rose flowers. How many square meters is the planting area of Chinese rose?

6. There are 240 science books in Class 6 (2), with fewer stories than science books. How many story books are fewer than science books?

Xiaoming said that he is three years younger than his grandfather this year. Xiao Ming is known to be 15 years old this year. How old is grandpa?

8. The price of a set of desks and chairs is 105 yuan, of which the price of chairs is 5/7 of that of desks. What's the price of this chair?

9. The school's nature interest group raised 2,500 silkworms last year, three times more than last year, and this year there are 100 silkworms. How many silkworms have you raised this year?

10. The school nature interest group raised 2,500 silkworms this year, more than last year 100. How many silkworms were raised last year?

1 1. There are two ribbons, the first one is 6.2 meters long, and the second one is 0.2 meters shorter than the first one. How many meters are the two ribbons?

12. One class 150 science and technology books, 50 story books are twice as few as science and technology books. How many story books are there?

13. The school library bought 120 story books, twice as many as comic books. How many comic books are there in the school?

14. The machine tool factory produced 2600 machine tools this year, 400 more than last year. How many machine tools did it produce last year?

15. There are 540 boys in the school, and 60 are less than 5/6 of the girls. How many girls are there in the school?

16, Yucai School has 1250 students, of whom 48% are girls. How many boys are there?

17. There are 540 boys in the school, and 60 are less than 5/6 of the girls. How many girls are there in the school?

18. A washing and dyeing factory planned to use 400 tons of water in the first half of the year, but actually used 388 tons of water, which percentage was saved?

19, Zhangzhuang Brick and Tile Factory planned to use 400 tons of coal in the first half of the year, but actually used 388 tons of coal, which percentage was saved?

20. A workshop used to use 65,438+050 tons of coal every month. After improving the technology, the monthly coal consumption is 127.5 tons, which percentage is saved?

2 1. The fertilizer plant planned to use 500 tons of water last month, but actually used 450 tons. What percentage of water was saved?

22. The original price of a book was 12 yuan, and now it is sold in 4.8 yuan at a reduced price. At what discount is this book sold?

23. A city sports meeting prepared 752 gold medals as planned. In order to leave room, I actually made 8 10 gold medals. What percentage did you actually do more than planned?

24. In June, the TV factory actually produced 840 TV sets, exceeding the output 120. What percentage of the planned output was the actual output in June?

Twenty-six people in Grade 25 and Grade 4 participated in the chess interest group, two less than those in the calligraphy interest group. How many people join the calligraphy interest group? (Equation)

26. The total output of rice in Yongfeng Township last year was 780 tons, 20% more than the total output of wheat. What is the total output of wheat?

27. Red Star Machine Tool Factory produced 2600 machine tools this year, 400 more than last year. How many machine tools did it produce last year?

28. The price of a table is 3.2 times that of a chair. It costs 2670 yuan to buy five chairs and four tables. What is the unit price of each chair?

29. The price of a set of tables and chairs is 48 yuan, and the price of chairs is the price of desks. What's the price of this chair?

A school planted 2,400 trees last year and 25,200 trees this year, more than last year?

3 1. There are 208 pear trees in the orchard, and the number of apple trees is three times less than that of pear trees 16. How many apple and pear trees are there?

32. After the price of a color TV set is reduced by 10%, the price of each set is 900 yuan. What is the original price of this color TV?

33. Complete the following statistics.

Attendance Statistics of Huaqiang Company in May 18

34. A pair of leather shoes is sold at a 10% discount, so customers can spend 20 yuan less than the original price. How much are these leather shoes?

Guangming Shoes Factory planned to produce 24,000 pairs of shoes in March, but actually produced 25,000 pairs. What is the percentage of overproduction?

36. A wheat experimental field produced 24.5 tons of wheat last year, an increase of 20% this year. How many tons of wheat does this experimental field produce this year?

37. A plot of land produced 65,438+02 tons of rice last year, which was 25% less than the previous year due to the flood. How many tons of rice did this land produce every year before?

38. A cotton field harvested 30 tons of lint last year, an increase of 5 tons over the previous year. How much has lint yield increased in this cotton field?

39. In a farm, the number of ducks is 20% less than that of chickens, and chickens are more than ducks 1000. Ducks are raised on this farm.

40. There are 800 exhibits in the school painting and calligraphy exhibition. Among them, the ratio of art exhibits to calligraphy exhibits is 5: 3. How many pieces are there in each of the two exhibits?

4 1, a piece of cloth is cut off by 6 meters, so this cloth is cut off. How many meters is left in this cloth?

42. In order to support the earthquake-stricken areas, a school launched a donation activity. 1 The donation to grade 3 is 1800 yuan, and the donation to grade 6 is more than 1 to grade 3. How much is the donation for the sixth grade?

43. A field is 120 hectares. The man who plowed on the first day plowed 37.5% on the second day. How many hectares were plowed the next day than the first day?

44. The height of the Egyptian pyramids is now about140m, which is lower than when it was built. How many meters was it when it was completed?

45. The fourth-grade students scored 40 points in the school sports meeting, 24 points less than the fifth-grade students. How many points did the fifth grade students get in the exam?

46. In grade five, 336 trees were planted. There are more trees planted in grade six than in grade five. How many trees are planted in the fifth grade than in the sixth grade?

47. There are 150kg cucumbers in the vegetable market. The weight ratio of tomato to cucumber is 5: 3. How many kilograms of tomatoes are there?

48. The ratio of male to female teachers in an experimental primary school is 2∶5, and there are 35 female teachers. How many male teachers are there?

49. There is a barrel of oil, two-fifths of which has been used, and there is 48kg left in the barrel. How much does this barrel of oil weigh?

50. There are two piles of coal, the first pile is 25.5 tons, and the second pile is less than the first pile 1.5 tons. How many tons do these two piles of coal weigh?

5 1. The following is the sales statistics of Shi Yu Store from September to February. 1999.

Answer the following questions according to this chart.

(1) What is this statistical chart?

(2) What is the sales volume of this store1February?

(3) What percentage has11month increased compared with1month?

(4) What is the average sales volume in these four months?

52. In a workshop, the original zinc and copper were * * * 84kg. Now, to cast zinc and copper into an alloy according to the ratio of 1: 2, it is necessary to add 12kg of copper. How many kilograms of copper?

53. For a cuboid model, the sum of all sides is 72 decimeters, and the ratio of length, width and height is 4∶3∶2. What is the volume of this cuboid model?

54. The playground of a school is 75 meters long and 45 meters wide. How many cubic meters of loess with a thickness of 5 cm should be padded on the playground?

55. A cube model is made of iron wire 12 cm long. What is its side length, surface area and occupied space?

56. Aunt Wang's cabinet air conditioner is 0.4m long, 0.2m wide and 1.7m high. In order to prevent dust, Aunt Wang is going to cover this air conditioner with a rectangular cover made of cloth. Please help her figure out how many square meters of cloth is needed to make this cover. (Seam * * needs 0.2 m2 of cloth).

56. The sum of the sides of a cube is 48 cm. How many square centimeters is its surface area?

57. Making alloys of brass and gold. At present, there are 40 grams of gold and 0/25 grams of brass/kloc. How many grams of gold should be added to make the ratio of gold to brass in the alloy reach 2∶5?

58. During the period of1950 ~1960, only 40 high-rise buildings were built in Shanghai, while during the period of 1990~2000, the number of high-rise buildings was as high as 55 times, of which 5% were super-high-rise buildings over 100 meters. How many super-high-rise buildings were built in Shanghai from 1990 to 2000?

59. There is a batch of goods in the shopping center. On the first day, 20% of the total shipment. The next day, it was 4 tons more than the total. There are 20 tons left at this time. How many tons are there in this shipment?

A road repair team was scheduled to complete a road in 7 days and completed 30% of the whole road in 3 days. At this time, what has not been repaired is 280 meters more than what has been repaired. How many meters will I have to repair every day to finish the task according to the original time?

A rectangular piece of land with a circumference of 48 meters and an aspect ratio of 5: 3. How many square meters is the area of this rectangular land?

For a parallelogram vegetable field, the sum of the bottom heights is 150m, and the ratio of the two is 3∶2. What is the area of this vegetable field?

Master Liu has to process a batch of parts, 40 pieces per hour, which can be completed in 3 hours. If the task is to be completed half an hour in advance, how much will the work efficiency be improved?

In a math contest, 1/7 students won the first prize, 1/3 won the second prize, 1/2 won the third prize, and the rest won commemorative prizes. It is understood that less than 50 students participated in this competition. How many people won the memorial prize?

A pesticide was prepared, in which the ratio of drug to water was 1: 150.

① How many kilograms of medicine and water does it take to prepare 755 kilograms of this pesticide?

(2) There are 3 kilograms of medicine. How many kilograms can this pesticide be matched?

(3) If there is 525 kilograms of water, how many kilograms of medicine should be put in the preparation of this pesticide?

* * * kindergartens in Le Tong have 150 books, 40% of which are allocated to large classes, and the rest are allocated to small classes and middle classes at a ratio of 4: 5. How many books are there in the small class and the middle class?

Two workshops 150 people. If 50 people are transferred from the first workshop, the number of people in the first workshop is 2/3 of that in the second workshop. How many people are there in workshop 2?

Maple Leaf Garment Factory received the task of producing a batch of shirts, and produced 600 pieces in the first five days, completing 40% of the task. According to this calculation, how many days will it take to complete this task?

The school bought 8 soccer balls and 60 skipping ropes, which cost 274.2 yuan. The price of each football is more than the price of 32 skipping ropes. How much is each football, 0.7 yuan?

The weight ratio of the two bags of sugar is 4∶ 1. Take out 10 kg of sugar from bag A and put it into bag B. At this time, the weight ratio of the two bags of sugar is 7: 5. Find the sum of two bags of sugar.

Zhang Mingjia used to use 28 tons of water every month. After using the water-saving faucet, the water used for one year can now be used for another two months. How many tons of water are used every month now?

A garden factory shipped 4500 trees last year, and this year plans to ship 20% more trees than last year. How many trees are you planning to move this year?

The Yellow River freighter has sailed 85 kilometers from Port A to Port B, which is exactly 5/7 of the waterway between Port A and Port B. How far is this freighter from Port B?

The paving team paved a road, 2.5 kilometers per day, and completed 5/8 of the total length in 7 days. How many kilometers is this road?

In the fifth grade, girls 12, which is equivalent to 2/3 of the number of boys. As a result, the number of winners accounted for 70% of the participants. How many winners are there?

The price of radio this year is 25% lower than last year. This year, the price of each radio is 36 yuan. How much did it cost last year?

Distance between the two places 120km. Two people, A and B, ride bicycles from two places at the same time. Car A runs every hour 14km. Four hours later, I met car B. What is the speed of car B?

There are two barrels of oil, and the weight of barrel A is 1.2 times that of barrel B. If you pour 5 kilograms of oil into barrel B, the two barrels of oil are equally heavy. How many kilograms are there in two barrels of oil?

* * * kindergartens in Le Tong have 150 books, 40% of which are allocated to large classes, and the rest are allocated to small classes and middle classes at a ratio of 4: 5. How many books are there in the small class and the middle class?

Maple Leaf Garment Factory received the task of producing a batch of shirts, and produced 600 pieces in the first five days, completing 40% of the task. According to this calculation, how many days will it take to complete this task?

Xiaoming read a book and read part of it in the morning. At this time, the ratio of read pages to unread pages is 1: 9. Read six more pages in the afternoon than in the morning. At this point, the ratio of read pages to unread pages becomes 1: 3. How many pages are there in this book?

The distance between A and B is 800 kilometers, and two cars, A and B, travel in opposite directions from two places at the same time. It is known that the speed ratio of A and B is 6: 5. How many kilometers did two cars travel when they met? (Three ways to answer)

A barrel of oil, 20% used, 32 kg left. How many kilograms is this barrel of oil?

A canteen burns 5 tons of coal in March and 4.8 tons in April. Compared with March, what percentage of coal was saved in April?

A factory has adopted new technology, and now the cost of each product is 37.4 yuan, which is 15% lower than the original. What is the original cost of each product?

Li Qiang weighs 33kg, more than last year 10%. What was his weight last year?

Team A repairs a road in 8 days, Team B 10 days, Team A takes 3 days, and how many days does it take for the remaining teams A and B to repair together?

Two cars, A and B, set off from two places 270 kilometers apart at the same time and met at 1 hour 30 minutes later. It is known that the speed ratio between car B and car A is 7:8. How many kilometers have these two cars traveled per hour?

The First Machine Tool Plant produced 89 1 machine tools this year, an increase of 10% over last year. How many machine tools have been added this year?

Xiao Wang rode his bike for two days and walked 144 km. On the first day, he walked 40% more than the next day. How many kilometers has he walked in these two days?

A cubic water tank, each side of which is 4 cm long, contains a box of water. If you pour this box of water into another rectangular water tank with a length of 0.8 meters and a width of 25 centimeters, what is the water depth?

A plot of land can be plowed 10 hour with the first tractor and 8 hours with the second tractor.

At present, two tractors plow together 1 hour for 20 minutes. What percentage of this land has been cultivated?

Vegetable farmer Zhang picked 8400 kilograms of Chinese cabbage and prepared to supply it to four food markets. During shipment, he lost 0. 1%. How many Jin can each market transport on average?

There are 250 bags of rice in the canteen. After eating 40%, buy 25 bags. What percentage of rice is stored at this time?

Dig an aqueduct with a length of 1500m. The aqueduct is trapezoidal in cross section and covers an area of 2.7m2 It is known that the width of the upper mouth of the aqueduct is 2.4m, the width of the bottom of the aqueduct is 1.2m, and the depth of the aqueduct is required.

A road repair team was scheduled to complete a road in 7 days and completed 30% of the whole road in 3 days. At this time, what has not been repaired is 280 meters more than what has been repaired. How many meters will I have to repair every day to finish the task according to the original time?

Neighborhood Committee A donated 240 cotton-padded clothes to the disaster area, 20% more than neighborhood Committee B. How much more cotton-padded clothes did you donate than neighborhood Committee B?

Team A and Team B jointly built a road. Team A completed 62% of the total length, 360 meters more than Team B. What is the total length of this road?

The number of students in class 62 is more than 6 1 class 12.5%, and there are 45 students in class 62. 6 1 How many students are there in Class 62?

Use a rectangular cardboard with a length of 50 cm and a width of 40 cm, and cut squares with a side length of 1 cm from four corners to make a carton. What is the volume of this carton? What is the surface area?

Two cars, A and B, leave relatively at the same time. Four hours later, car A traveled 80% of the whole journey, and car B exceeded the midpoint 13 km. As we all know, car A travels 3 kilometers more than car B every hour. How many kilometers is it between a and b cities?

A rope was cut off by 5/9 of its total length for the first time, and the ratio of the length cut off for the second time to the length cut off for the first time was 9: 20, leaving 7 meters. How many meters did this rope grow?

Two cars, A and B, leave from AB at the same time. Five hours later, the two cars met at a distance of 35 kilometers from the midpoint. At this time, the ratio of the distance traveled by A and B is 5: 4. What are the speeds of A and B?

When salt is dissolved in water, salt water is formed. At present, there are 2000 grams of saline water containing 10%, and the concentration should be increased as needed to make the salt content reach 20%.

What feasible methods do you think can be adopted? (List at least two)

(2) Choose a method and specify it by calculation.

Passenger cars and trucks leave from A and B relatively simultaneously. Three hours later, the bus has traveled 60% of the whole journey, and the truck is 30 kilometers away from the midpoint of the whole journey. As we all know, the speed of a bus is 24 kilometers more than that of a truck, so find the distance between A and B.

The weight ratio of goods in warehouse A and warehouse B is 7:8. If the goods are delivered from warehouse B and 6 tons are brought in from warehouse A, then warehouse A is 14 tons more than warehouse B. How many tons are the original goods in warehouse A and warehouse B?

The road construction team plans to complete a road in five days. 22% of the whole journey was completed on the first day, and 23% of the whole journey was completed on the second day. The distance ratio of the last three days is 4:4:3, and the last day is 27 meters. How long is this road?

An alloy contains 3:4 copper and zinc, and 63 grams of new alloy with copper-zinc ratio of 1:2 is made from this alloy. Do you want to add copper or zinc? How many grams?

The typist typed a manuscript. On the first day, I typed 25% of the total, on the second day, I typed 40% of the total, and on the second day, I typed 6 more pages than on the first day. How many pages are there in this manuscript?

For a pile of coal, the ratio of tonnage transported on the first day to total tonnage is 1: 3. 4.5 tons were shipped the next day, and just half of the total tonnage was shipped in two days. How many tons is this pile of coal?

Make a rectangular water tank (without cover) with a length of 3 meters, a width of 0.8 meters and a height of 0.5 meters with iron sheet. How many square meters of iron does it take? (The number is reserved for the whole square meter, and an approximate value is obtained in one way. )

If the park tickets are for each 8 yuan, is it enough for a school to organize 97 students to go to the park to play with 800 yuan?

It takes 20 hours to produce a batch of parts, and the working efficiency of B is 80% of that of A. If two people work together, how many hours does it take to produce 9/ 10 of this batch of parts?

* * * kindergartens in Le Tong have 150 books, 40% of which are allocated to large classes, and the rest are allocated to small classes and middle classes at a ratio of 4: 5. How many books are there in the small class and the middle class?

Two workshops 150 people. If 50 people are transferred from the first workshop, the number of people in the first workshop is 2/3 of that in the second workshop. How many people are there in workshop 2?

The planting situation of fruit trees in Guangming Orchard is as follows:

The number of trees in each row.

Apple tree 12 25

Taoshu 14 28

Official script 12 32

How many fewer apple trees are there than peach trees?

How many percent are pear trees more than apple trees?

The tractor plowed a 40-acre field and plowed two-fifths in the morning. The rest will farm 6 hectares per hour. How many hours does it take to finish plowing?

Xin Li wants to read a book "100,000 Why" and plans to finish it in 12 days. In fact, he read 40% in the first five days. According to this calculation, can Xin Li finish the book as planned? Please provide a justification for the answer.

When two students come home from school, A walks more than B 1/5, and B walks less than A111.What is the speed ratio between A and B?

The bucket is half full of salt water. The weight ratio of salt to water in brine is that if 200 grams of salt is added to the bucket, the concentration of this brine should remain unchanged. How many kilograms of water should I add to the bucket?

To build a 200-meter road, the total length of 15% was built six days ago. According to this calculation, how many days will it take to complete the project?

A rectangular piece of land, length120m, width ratio. What is the area of this land in square meters?

A typist typed a manuscript and typed 25% on the first day. The next day, those who typed the manuscript typed 20 thousand words more than the first day. How many words are there in this manuscript?

When a project builds a highway, the ratio of kilometers completed on the first day to the total length is 1∶3. If you build 15 km, you can complete half of the expressway. How many kilometers is this highway?

There is a barrel of oil. I used 20% for the first time, 1.4 kg for the second time, and there is 1.6 kg left. How much does this barrel of oil weigh?

It takes 10 hour for Party A to make a batch of parts, and Party B can only make this batch of parts at the same time. Find a time for two people to cooperate to complete these tasks?

Seven, according to the formula to add conditions to the application problem. 6%

There are 2400 kilograms of rice in warehouse A, (), and how many kilograms of rice in warehouse B?

2400×40%

2400×( 1+40%)

2400÷40%

2400÷( 1-40%)

The teaching building was originally planned to invest 2 million yuan, and the actual investment after the improvement plan was 6,543,800 yuan+8,000 yuan, which was a few percent less than the original plan.

The oil yield of soybean is 13.5% to 15%. An oil mill needs 8.5 tons of soybeans every day. What is the maximum oil output of this factory every day?

The machine tool factory plans to produce 320 more machine tools this year than last year, an increase of only 20%. How many machine tools do you plan to produce this year?

In the first month, the Loma Highway was completed. If 10 km is built, the length ratio of the repaired and unrepaired roads is 1: 1. How many kilometers is this highway?

Two cars, A and B, start from two cities, A and B, and drive in opposite directions at the same time. A travels 60 kilometers per hour and B travels 50 kilometers per hour. Two hours after departure, B traveled all the way. How many kilometers is it between A and B?

The computer company planned to assemble 1.200 computers in May, and actually completed 1.500 computers. What is the percentage of overproduction this month?

Clothing factory used to make a suit out of 3 meters of cloth, but later adopted a new cutting process, which can save each suit. How many sets of cloth can you make now instead of 9000 sets?

Zhang Xin read a popular science book with 120 pages. On the first day, he read 30% books. The next day, he read the rest. How many pages did he read the next day?

Train A runs from A to B, which is still 100 km away. How many kilometers is the railway from AB to Shenzhen?

There are 84 students in Class A and Class B, and 57 students in Class A and Class B. Find the number of students in two classes.

A highway is 60 kilometers long and is divided into three sections: uphill, flat and downhill. The length ratio of each section is 1 :2 :3, and the time ratio for Uncle Zhang to ride through each section is 3 :4 :5. It is known that his riding speed on a flat road is 25 kilometers per hour. How long did it take him to finish the trip?

The weight ratio of goods in warehouse A and warehouse B is 7:8. If 6 tons are transported from warehouse B to warehouse A, the goods in the two warehouses are equal. How many tons of the original goods in warehouse A and warehouse B?

An alloy contains 3:4 copper and zinc, and 63 grams of new alloy with the ratio of copper and zinc of 1:2 is made from this alloy. Ask whether to add copper or zinc, add () grams.

Party A and Party B each do a job. If it's all sunny, it takes 12 days for Party A and 15 days for Party B to complete it. On rainy days, the working efficiency of A is 40% lower than that of sunny days, and that of B is 10%. They both started working at the same time, which happened to be finished at the same time. How many rainy days are there at work?

The road repair team completed a section of highway in three days, with 40% of the total length completed on the first day, 2.5 kilometers completed on the second day, and the whole length completed on the third day. How many kilometers is this road?

A batch of parts will be distributed to Party A, Party B and Party C, with Party A completing 30% of the total task and Party B and Party C making 200 parts according to the ratio of 3: 4. How many parts are there in this batch?

The engineering team built a section of highway, the first day, the second day,150m, and the third day, three days just finished the task. How long is this road?

The stadium bought 16 basketball and 12 football, and * * * paid 760 yuan. It is known that the unit price ratio of basketball and football is 5: 6. How much does the stadium pay for basketball and football?

A bus and a truck go from A to B at the same time. It takes five hours to travel by bus and seven hours to travel by truck. When the bus workshop is halfway through the whole journey, how many times has the truck traveled?

The factory used to produce 1800 machine parts every day, but now it is less than the original 10%. How many machine parts are produced every day now?

A highway has been repaired. If you build another 300 meters, you can build half the road. How long is this road?

The weight of original orange in fruit shop is more than that of apple 100 kg. After selling kilograms of oranges, the weight of apples is 25 kilograms more than oranges. How many kilograms of oranges are there in the fruit shop?

The following is the statistical chart of the turnover of Longcheng Shopping Mall from June 5438 to March 2002. Look at the picture and answer this question.

(1), the turnover in February was ()% more than 1 month;

(2) The average daily turnover in these three months is () ten thousand yuan.

Grandpa's medicine bottle label says 80 tablets, each tablet 10g. The doctor's prescription says, 10g take 20g three times a day. Do you think that's enough? Please answer in two ways.

There are 56 students in the sixth grade of Houcun Primary School, including boys. Later, I transferred a few boys. At this time, boys accounted for the whole class. How many boys have transferred to other schools?

As the picture shows, the distance from village D to city B is 25 kilometers.

a city

B cheng

ten thousand

D village

(1) The distance from D village to C bay is the distance from D village to B city. How many kilometers is the distance between village D and Bay C?

(2) The distance from Bay C to City B is the distance from City B to City A. What is the distance between City A and City B?

(3) According to this route, what is the distance from village D to city A?

The weight ratio of goods in warehouse A and warehouse B is 7:8. If the goods are delivered from warehouse B and 6 tons are brought in from warehouse A, then warehouse A is 14 tons more than warehouse B. How many tons are the original goods in warehouse A and warehouse B?

The road construction team plans to complete a road in five days. 22% of the whole journey was completed on the first day, and 23% of the whole journey was completed on the second day. The distance ratio of the last three days is 4:4:3, and the last day is 27 meters. How long is this road?

An alloy contains 3:4 copper and zinc, and 63 grams of new alloy with copper-zinc ratio of 1:2 is made from this alloy. Do you want to add copper or zinc? How many grams?

There are three baskets of pears of the same weight. Take out the first basket and the second basket, and take out 35kg from the third basket. At this time, the remaining pears in the three baskets are exactly equal to the original two baskets. How much does each basket weigh?

The bus and the loan car run in opposite directions from the midpoint of A and B at the same time. Four hours later, the bus arrived at A, and the loan car was 50 kilometers away from B. It is known that the ratio of the speed of the loan car to the bus is 3: 4. How many kilometers is it between A and B?

At the 27th Olympic Games, the statistics of medals won by China athletes are as follows:

Gold, silver and bronze medals.

28 yuan 16 yuan 15 yuan

(1) What percentage of the total medals are gold medals?

(2) What is the percentage of bronze medals in the number of banks?

(3) What is the proportion of gold medals compared with bronze medals?

It takes 15 days for Team A and Team B to build a canal together. The efficiency ratio between Team A and Team B is 2: 3. How many days will it take if Team B builds the canal alone?

There are two piles of coal, A pile and B pile. If A pile is transported to B pile with 10 tons, then A pile is 5 tons less than B pile. Now, after both piles have transported the same amount of tons, what remains in B pile is what remains in A pile. How many tons of coal is left in A pile at this time?

The school canteen burned coal 1.5 tons in May, saving 0.3 tons and saving several percent compared with April.

The road repair team built a road, and 24% of the total length was built in the first four days. On the fifth day, with the same work efficiency, 80 kilometers of roads were built in one day. How many kilometers is this road?

Xiaoming read a story book. On the first day, he read 24 pages, accounting for 37.5% of the book. The next day, how many pages are left?

According to the different conditions given, the formulas are listed separately without calculation.

There are 400 literature books in the library. How many science books are there?

(1) The number of literary books belongs to scientific books.

(2) There are more science books than literature books.

(3) The number ratio of science and technology books to literature books is 5:8.

(4) There are 84 fewer literature books than science books.

(5) Literature books are equal to 60% of science books.

(6) It is exactly 40% of the total number of science and technology books and literature and art books.

120 hectares of wheat field is harvested 3.5 hours before the harvester. At this rate, how many hours will it take to harvest this land?

In the fourth grade of experimental primary school, 120 people participated in the open competition, and the winners accounted for the total number, and the winners were girls. What is the percentage of boys in the total population?

The store sells two washing machines at the same time, each of which costs 2400 yuan, one of which is 20% higher than the purchase price and the other is 20% lower than the purchase price. Generally speaking, does the shop sell these two washing machines to make money or lose money? what do you think?

The vegetable shop brought 350 kilograms of cucumbers and tomatoes, of which the weight of cucumbers accounted for all. How many kilograms of cucumbers are transported?

In the "hand-in-hand activities" for primary school students in urban and rural areas, Jianguo Primary School donated 1620 books, of which the ratio of story books to comic books was 5: 4. How many books are there in each of these two books?

The original price of a commodity is 20 yuan, and there are four stores, A, B, C and D, which are promoted by different sellers.

A store: 10% discount. B shop: 10% discount. Shop C: "Buy ten and get one free".

Ding Dian: If you buy 100 yuan, you can enjoy a "20% discount".

(1) If you only buy one, it is cheaper to go to () store, and the unit price is () yuan.

(2) If you buy too much, you'd better go to () store, because if you buy too much (), the unit price is () yuan each.

The typist typed a manuscript. On the first day, I typed 25% of the total, on the second day, I typed 40% of the total, and on the second day, I typed 6 more pages than on the first day. How many pages are there in this manuscript? ?

For a pile of coal, the ratio of tonnage transported on the first day to total tonnage is 1: 3. 4.5 tons were shipped the next day, and just half of the total tonnage was shipped in two days. How many tons is this pile of coal? ?

Make a rectangular water tank (without cover) with a length of 3 meters, a width of 0.8 meters and a height of 0.5 meters with iron sheet. How many square meters of iron does it take? (The number is reserved for the whole square meter, and an approximate value is obtained in one way. )

* * * kindergartens in Le Tong have 150 books, 40% of which are allocated to large classes, and the rest are allocated to small classes and middle classes at a ratio of 4: 5. How many books are there in the small class and the middle class?

Two workshops 150 people. If 50 people are transferred from the first workshop, the number of people in the first workshop is 2/3 of that in the second workshop. How many people are there in workshop 2?

How many square centimeters does it take to cut a cuboid with a length of 10 cm, a width of 6 cm and a height of 4 cm into two small cuboids?

On Sunday, Xiao Ming's mother went to play in the street and saw a billboard posted in front of a shop, saying, "All clothes in this shop are sold at a 20% discount." Xiaoming's mother took a fancy to one of the clothes. After some bargaining, the shopkeeper promised another 5% discount. As a result, Xiao Ming's mother spent 150 yuan to buy this dress. Students, can you work out the original price of this dress?