2. One workshop plans to process 150 parts. Workers can process 15 more parts every day after a day's work, and finish the task in three days. How many parts will the workshop process every day after improving the operation method?
3. In the stock market transactions in China, 7.5% fee is paid for each transaction. An investor buys 65,438+00,000 shares at a price of 65,438+00 yuan per share. When the stock rose to several yuan, he sold all these stocks and made a profit of 18350.
4. The five-year annual interest rate of housing provident fund loans is 3.6%, and that of ordinary housing loans is 4.77%. When Mr. Wang bought a house, he borrowed 250,000 yuan and paid it off in five years. Pay interest in the first year 10 170 yuan. How much did Mr. Wang borrow from the housing provident fund loan? How much is the ordinary housing loan?
5. For a batch of 200 workpieces, Party A and Party B shall each make a part and finish it at the same time. It is known that Party A needs 60 minutes to complete his work and 90 minutes to complete his work. How many workpieces do Party A and Party B do respectively?
6. The walking speed ratio of A and B is 7: 5. They both started from A and B at the same time, went in opposite directions, and met 0.5 hours later. If they start from A and B at the same time and go in the same direction, how many hours will it take A to catch up with B?
7. There are 26 workers producing parts A and B in the workshop, and each worker produces 120 parts A or 180 parts per day on average. How many workers should be assigned to produce parts A and B respectively in order to match parts A and B in a ratio of 3:2?
8. A workshop assembles six machine tools every day, and it is expected that a batch of machine tools can be completed in a few days. After assembling one-third of these machine tools, the technological level has been improved and the working efficiency has been improved by four times. As a result, it was completed 10 days ahead of schedule. What is the number of these machine tools?
9. For two-digit numbers, one digit is twice as much as ten digits. If the single digit and the tenth digit are reversed, the number obtained is 36 larger than the original number, and the original number is found.
10. After learning of the Wenchuan earthquake on May 6, 2008, students from a school immediately extended a helping hand. There are even 50 students in Class 1, Grade 7, and the total donation is more than 10 of the whole school. There are 54 students in Class 2, which is less than 30 yuan's contribution to total mathematics 12 times.
(1) If the total donations of the two classes are equal, what is the per capita donation of this school?
(2) If the per capita donation of Class Kloc-0 in Grade 7 is more than that of Class 2 in Grade 7 by 0.5 yuan, what is the per capita donation of this school?
1 1. Grandpa and grandson play chess. Grandpa won a set, 1, and grandson won a set, 3 points. They played 12 sets (no draw) and the score was the same. How many sets did they win?
12. Install a conical container with a bottom diameter of 30cm and a height of 8cm, and then pour water into an empty cylindrical container with a bottom diameter of 10cm. How high is the water in the cylindrical container?
13. Solve the application problem by listing the equations: In a certain place, grain farmers are required to calculate the agricultural output value per mu according to the yield of 750 kg per mu/kg 1. 1 yuan. The annual output value multiplied by the agricultural tax rate is the payable agricultural tax, and in addition, the "agricultural surcharge" is paid at 20% of the agricultural tax (agricultural surcharge is mainly used for the normal operation of village-level organizations).
(1) Last year, the agricultural tax rate was 7%, and Uncle Wang planted 10 mu of rice, so how much agricultural tax and agricultural surcharges should he pay?
(2) This year, the state reduced the agricultural tax rate in order to reduce the burden on farmers, encourage grain production, and directly subsidized the 20 yuan per mu of water dance (tax deduction). Uncle Wang still planted 10 mu of rice this year. He said happily, "If this is reduced, this year will pay 497 yuan less than last year." Would you please check the agricultural tax rate in this area this year?
14. Wang Qiang took part in the 3000m race. He ran a distance at a speed of 6 meters per second and the rest at a speed of 4 meters per second. It took 10 minutes. How many meters did Wang Qiang run at a speed of 6 meters per second?
15. Xiao Zhao and Xiao Wang had an exchange activity during the summer vacation. Xiao Zhao said, "I went to a week-long technology summer camp. The sum of the dates of these seven days is 84. Do you know what date I went out? " Xiao Wang said, "I went to my uncle's house for seven days during the holiday. The sum of the date and the number of months is 84. Guess what date I went home? " Try to list the equations and answer the questions of Xiao Zhao and Xiao Wang.
16. It is understood that the taxi charging standards in our city are as follows: if the mileage does not exceed five kilometers, 5 yuan will be charged; If the mileage exceeds 5 kilometers, the excess part will be charged at 1.2 yuan per kilometer except 5 yuan.
(1) If someone travels by taxi for x kilometers (x >: 5), how much should he pay?
(2) A tourist takes a taxi from Xinghua to Shagou and pays 4 1 yuan. Try to estimate how many kilometers it is from Xinghua to Shagou.
17. The first and second teams have a get-together. There are m people in the first team, and the second team has two more people than the first team. If each member of two teams gives a gift to each member of the other team.
Q: (1) The total number of gifts given by all players. (represented by the algebraic expression of m)
(2) When m= 10, how many gifts are given?
18. The price of a commodity rose by 5% when compared with 1998, and rose by 0% when compared with 1999 1998, compared with10 in 2000. So, in 2000, compared with 1997, was it price increase or price decrease? What is the percentage of price increase or decrease?
19. The playground is 400 meters long. A practice cycling, with an average of 350 m per minute; B practice running, running an average of 250 meters per minute. How long does it take for two people to meet for the first time from the same place and in the opposite direction at the same time? How long did it take to meet again?
20. Three fifths of a basketball plus three fifths of a kilogram is exactly the weight of the basketball. How many kilograms is this basketball?
2 1. A batch of goods, shipped on the first day 1 this batch of goods, shipped on the second day, 4/5 of the first day, with 60 tons left. How many tons are there in this shipment?
22. The school choir has 24 more people than the dance team. Two fifths of the chorus is equal to six sevenths of the dance team. How many people are there in each team?
23. There are 80 books on the upper and lower floors, with 15 borrowed from upstairs and 1 borrowed from downstairs. The remaining books on the two floors are just equal. How many books are there on the upper and lower floors respectively?
24. There are 60 male employees in a factory who exceed three-fifths of the total number of employees in the factory, and the female employees are 1. How many employees are there in this factory?
25. There are two baskets of oranges, and the second basket is 3/5 of the first basket. After taking 5 kg from the first basket and putting it in the second basket, the second basket is 7/9 of the first basket. How heavy are the first two baskets?
26. In the school art group, boys accounted for 5/9 last semester, and girls increased by 84 this semester, so boys only accounted for 2/5. How many girls are there in this group?
27. The father is 40 years old and the son 12 years old this year. How old is the son when his age is five tenths of that of his father 12?
28. Bookstores sent 240 packages of * * * science and technology books and literature and art books, accounting for 6 1. Later, a batch of science and technology books were sent, and at this time, science and technology books accounted for 1 1 of the total number of two books. How many books are there now?
29. The price of a commodity has been reduced by 1 for two consecutive times, and the price is 8 1 yuan. What is the original price of this commodity?
30. There are 84 students in Class A and Class B, 5/8 students in Class A and 3/4 students in Class B. How many students are there in each class?
3 1. There are two baskets of pears, in which basket A is 7 kilograms lighter than basket B, basket A sells for three fifths, and basket B sells for 1 1. The remaining two baskets of oranges weigh the same. How many kilograms do these two baskets weigh?
32. The circumference of a rectangle is 1007 cm. If the length increases by 1 and the width increases by 1, the circumference increases by 30 cm. What is the area of the original rectangle?
33. The vendor sold half of his watermelons to the first customer and the rest 1 to the second customer. In this way, he just sold out after selling it to the sixth person. How many watermelons does the vendor have?
34. The monthly income ratio of Zhang and Li is 5:4, and the monthly expenditure ratio is 13: 10. Therefore, both companies have the balance of 240 yuan. What is their monthly income?
35. A store chooses two kinds of sweets from 28 yuan and 20 yuan per kilogram to be mixed and sold as mixed candy. In order to make the price of this mixed candy be 25 yuan per kilogram, it is necessary to distribute this mixed candy over 65,438+000 kilograms. How many kilograms do these two kinds of sweets need?
36. The expressway site needs blasting. After igniting the fuse, the operator should run to a safe area 400 meters away before the explosive explodes. It is known that the burning speed of the fuze is 1.2 cm/s and the running speed of human is 5 m/s. How long does it take to fuse?
37. The comprehensive practical activity group of Class 2, Grade 3 went to supermarkets A and B to investigate the sales situation of May Day holiday last year and this year. The following is the exchange of three small partners. Please calculate the sales of supermarket A and supermarket B during the May Day holiday this year.
A: "The sales of the two supermarkets were 6.5438+0.5 million yuan last year and 6.5438+0.7 million yuan this year."
B: "The sales of Supermarket A increased by 15% this year compared with last year."
C: "The sales of supermarket B increased by 10% this year compared with last year."
38. Two grain depots, A and B, each have a whole bag of grain. If 90 bags are transferred from a to b, the grain stock in b is twice that in a; If several bags are transferred from warehouse B to warehouse A, the grain storage of warehouse A is six times that of warehouse B ... How many bags of grain are stored in warehouse A?
39. In order to save energy, a unit charges electricity according to the following regulations every month: the electricity consumption does not exceed 140 kwh, and it is charged at 0.43 yuan per kwh; If it exceeds 140 degrees, the excess will be charged at 0.57 yuan per degree. If the average electricity bill charged by Mexican consumers in April is 0.5 yuan per kWh, how much should consumers pay in April?
40. The ratio of delivery staff to sales staff in the home appliance department of a shopping mall is 1: 8. Due to the obvious increase in the purchase of home appliances this summer, the manager of the home appliance department transferred 22 people from the sales staff to deliver the goods. Results The ratio of delivery staff to sales staff was 2: 5. Ask how many delivery people and sales people are in the home appliance department of this shopping mall.
4 1. We are now promoting a certain commodity, and reducing the price by 10%. In order to keep the sales amount unchanged, what percentage will the sales volume increase over the original price?
42. The sum of the original unit prices of commodities A and B is 100 yuan. Due to market changes, a commodity decreased by 65,438+00%. B after the price adjustment, the price of the commodity rose by 5%, and the sum of the unit prices of the two commodities rose by 2%. What are the original unit prices of A and B respectively?
43. The number of people in Workshop A is 30 less than 4/5 of Workshop B. If 10 is transferred from Workshop B to Workshop A, then the number of people in Workshop A is 3/4 of Workshop B. Find the original number of people in each workshop.
44.A rides a bike from place A to place B, and B rides a bike from place B to place A, both of which advance at the same speed, thus knowing that they will start at 8 o'clock in the morning at the same time. At 10 in the morning, the distance between them was still 36 kilometers, and at 12 at noon, the distance between them was 36 kilometers. How can we find the distance between a and b?
45. The length of cars A and B is 180m. If two trains are driving relatively, it takes * * *12s from the moment the head and tail meet; If driving in the same direction, it takes 60 seconds from the front of car A to the rear of car B, and the speed remains unchanged. Find the speed of a car and b car.
46. Two candles with the same length, the thick one burns for 3 hours and the thin one burns for 8/3 hours. When the power goes out, two candles are lit at the same time, and when the phone calls in, they are blown out at the same time. Thick is twice as long as thin, and you can find the time of power failure.
47. During the summer vacation, someone in go on road trip planned to drive the same distance every day. If a car travels more than 19 kilometers per day than originally planned, its journey will exceed 2200 kilometers in 8 days; If a car travels less than planned 12km every day, it will take more than 9 days to travel the same distance. What is the planned daily mileage of this car?
48. In a factory, two workers, A and B, made a batch of equal protective clothing at the same time according to the instructions of their superiors. At the beginning, B made four fewer pieces than A every day. By the end of the day, there were 80 pieces left, and B did two more days than A. At this time, A kept the work efficiency unchanged, and B made five more pieces than before after improving the work efficiency, so that A and B completed the task at the same time. B how many things do you do every day?