2. In the assembly workshop, the number of male employees is equivalent to 40%, and the number of female employees is equivalent to 20%. It is understood that there are female employees 130 in this workshop. How many male employees are less than female employees?
The greening team renovated the garden in the center of the street and spent 900 yuan on it. Compared with the original plan, it saves 300 yuan and a few percent.
4. The length of a steel pipe is10m. Cut off 7/ 10 for the first time, and cut off the remaining 1/3 for the second time. How many meters are left?
5. 25 kilograms of salt water, with a salt content of 20%. After adding some water, the salt content is 8%. How much water did you add?
6. One cylinder of water used up 1/2, leaving 30 barrels. How many buckets of water are there in this water tank?
7. The length of a steel pipe is10m, and it is cut 1/4 for the first time and 40m for the second time. How long is the rope?
8. Xiaohua wants to buy 6 cards at the price of 10 yuan. How much did she save because the price of greeting cards was reduced by 20%?
9. In an army shooting practice, 100 bullets hit and 25 bullets missed. What's the hit rate?
10. There are 240 students in Grade 6, of whom 45% are girls. How many boys are there?
1 1. There are 240 students in grade six, of whom 45% are girls. How many boys are there?
12. Last year, Hongxing Township planned to afforest 9 hectares, but actually afforested 12 hectares. What is the percentage of the actual afforestation plan? How much more than originally planned? (Keep one decimal place before the percent sign)
13. A section of road is 3000 meters long. Two-thirds of it was repaired on the first day and 1/4 on the second day. How many meters did you build in two days?
14. There is a circular reservoir. Its circumference is about 31.4m. What is its floor space?
15. A car traveled 5/8 of the way from A to B, leaving 240 kilometers. How many kilometers has this car traveled?
16. Do the same work, team A will finish it in 4 hours and team B will finish it in 5 hours. What's the working efficiency of Team A compared with Team B?
17. A naughty family of three and a smiling family of four went to a restaurant for dinner. Total meals 140 yuan. The two families decided to share the cost of meals according to the number of people. How much should each family pay?
18, a shopping mall held a promotion during the "October 1st" period, and all the goods were 30% off. The original price of a certain brand coat is one in 840 yuan. How much can I save by buying such a coat?
19. Uncle Li bought a national construction bond of 40,000 yuan with an annual interest rate of 3.8 1% for five years. What is uncle Li's principal and interest at maturity?
20. The diameter of a bicycle is 60 cm. If the average speed is 120 times per minute, how many kilometers do you walk in half an hour?
2 1. A kind of concrete is made of cement, sand and stone in a ratio of 2:3:5. Now, how many tons of cement, sand and stone do you need to make 120 tons of this concrete?
22. Xiaoming's electricity consumption in June was 180 kwh, 20% more than that in June. The electricity charge per kWh is 0.54 yuan. How much is Xiaoming's electricity bill in July?
23. Shopping malls offer discounts, with 50% discount on clothes and 20% discount on stationery. How much does Xiao Ming actually spend on a dress with the original price of 320 yuan and a schoolbag with the original price of 120 yuan?
24. There are 54 people who take part in track and field competitions, which is 25% less than those who take part in ball games. How many people took part in the game?
25. Build a 2-meter-wide path outside an 8-meter-diameter circular garden. What is the area of this path?
26. The enclosure of the gymnasium is round. Naughty walked around the fence, 628 steps, and naughty walked about 0.6 meters each step. How many square meters does this gymnasium cover?
27. In dry air, oxygen accounts for about 265,438+0% by volume, and nitrogen accounts for about 78% by volume. What is the volume ratio of oxygen to nitrogen? What is the volume ratio of oxygen to air?
28. The circumference of a rectangle is 88 cm, and the length-width ratio is 4:7. How many centimeters is the length and width of a rectangle? What is the area?
29. A batch of 1 200 books, of which 1/4 was distributed to lower grades, the rest were distributed to middle and high grades at a ratio of 4: 5, and several books were distributed to lower, middle and high grades respectively.
30. The ratio of students in Grade 5 to Grade 6 is 5: 7. It is understood that the sixth grade has 86 more students than the fifth grade. How many people are there in two grades?
3 1. There were 1200 students, 2 15 graduates and 0/80 freshmen in bright primary school last school year. Compared with the last school year, has the number of students in this school year increased or decreased? About a few percent increase or decrease? (Keep one decimal place before the percent sign)
32, a story book, Wang Qiang read two-fifths of the book on the first day, read the remaining two-fifths the next day, leaving 20 pages unread. How many pages are there in this book?
33. There is a batch of goods at the station. On the first day, all the goods of 1/3 were shipped less than 20 tons, and on the second day, all the goods of 10 were shipped more. At this time, there are 70 tons of goods in the station. How many tons are there in this shipment?
34. The fertilizer plant plans to produce a batch of fertilizers. On the first day, 1/6 of all tasks was produced, on the second day, 1/4 of the remaining tasks was produced, and on the third day, 1/5 of the previous two days was produced, leaving 50 tons unfinished. How many tons of fertilizer does the fertilizer plant plan to produce?
35. The number of female workers in a wool mill accounts for the whole factory. What percentage are female workers more than male workers? What is the ratio of male employees to female employees?
Due to the improvement of equipment, the daily output of a chemical plant increased from 40 tons to 60 tons, an increase of several percent?
37. A TV factory produces 4,800 TV sets, of which 4,608 are qualified products, and the qualification rate and rejection rate of TV sets are sought.
38. In an army shooting practice, 100 bullets hit and 25 bullets missed. What's the hit rate?
There are 250 employees in the garment factory, and 248 people are on duty today. What's the attendance today? What's the absenteeism rate today?
40. Dissolve 25 grams of salt in 100 grams of water to find out the salt content of brine.
4 1, an alloy of tin and lead, weighs 45 kg, of which 27 kg is lead. Find out the lead content of this alloy.
42. An expedition originally planned to walk 40 kilometers a day and reach its destination in eight hours. Because of the need of work, it walks 10 km every day, which actually shortens the time?
43. To do the same job, Team A will finish it in 4 hours and Team B will finish it in 5 hours. How efficient is Team A?
44. A car travels from A to B at a speed of 40 kilometers per hour, and when it returns, the speed is 10 kilometers per hour. How much has the speed increased?
45. If a number is increased by 25%, how much percentage should it be reduced to get it back?
46. The circumference of the bottom of a cylinder is 2/3 of the circumference of the bottom of another cone, and the height of this cone is 2/5 of the height of the cylinder. What is the volume of this cone?
47. There is a cylindrical/glass one. The measured internal longitude is 8 cm, and the depth of the medicine is 6 cm, which is exactly 4/5 of the contents of the glass. How much potion can I add to fill the cup?
48. There is a square wood, the fast side is 20 cm long, and it is planed into a cylinder with the largest diameter at the bottom. What is the volume of wood planed out?
49. Assemble radios in two groups. Group A assembles 50 radios every day, and completes 10% of the total task on the first day. At this time, Group B began to assemble 40 radios every day. How many days did Group A complete these tasks?
50. The fruit shop bought several kilograms of apples at the price of 1.5 kilograms of 2 yuan money and sold them at the price of 2.5 kilograms of 4 yuan money. If the store wants to make a profit of 100 yuan, how many kilograms of fruit must this fruit shop sell?
5 1, master and apprentice made a batch of parts together. The ratio of the number of parts made by master and apprentice is 9:7. Results When the task was completed, the master made 5/8 of the total, 30 more parts than originally planned. How many parts does the master plan to manufacture?
52. Two cars are driving from A to B at the same time. The car travels more than the big car12km/h. The bus will arrive in B in 4.5 hours. It returns along the original road and meets the cart at 3 1.5 km at B. How many kilometers does the cart travel per hour?
53. A pool can be filled with an open pipe in 40 minutes and with an open pipe 1 hour. If two pipes are opened at the same time, how long will it take to fill three quarters of the whole pool? A batch of wheat is transported by trucks with the same load, accounting for 5/6 of the total, 10 cars 1 10 tons. How many tons are there in this batch of wheat?
This fruit shop can get 390 kilograms of apples, bananas and pears a day. The weight of apples is 1.5 times that of pears, and the weight of bananas is 3/4 of that of pears. How many Jin are three fruits brought in?