2. A car consumes 4/5 kilograms of fuel per line for 8 kilometers, and how many kilometers per kilogram of gasoline is feasible on average. How many kilograms does driving 1 km consume?
3. A motorcycle 1/2 hours for 30 kilometers. How many kilometers does it travel per hour? How many hours does it take him to drive 1 km?
Four out of seven students reading in the reading room are boys. After five male students walked out of the reading room, twelve of the twenty-three were female students. How many students were reading in the original reading room?
There are 62 red, yellow and blue balloons, of which three-fifths of the red balloons are equal to two-thirds of the yellow balloons, and there are 24 blue balloons. How many are Red Balloon and Yellow Balloon?
There are 36 students reading in the school reading room, 4/9 of whom are female students. Later, several female students came. At this time, the number of female students accounted for 3/5 of the number of students. Later, several female students came.
7. When water turns into ice, its volume is110, 2. 16 cubic meters of ice melts into water, what is its volume?
8. Party A's grain is 560 tons. If 2/9 of Party A's grain is shipped to Party B, Party A's grain is exactly the same. How many tons of grain does Party A have? How many tons of grain does B have?
9. The price reduction of TV sets in 200 yuan is 2/ 1 1. What's the price of this TV set now?
The original price is
10。 Car A has traveled more than 2/5 kilometers from A to B.. At this time, there are still 70 kilometers from B. How many kilometers are there between A and B?
1 1. Xiaoming reads books. On the first day, he read 28 pages. The next day, he read the whole book 1/5 (1). Last two days, * * * read 3/8 (8/3) of the whole book. How many pages does this book have?
12. Both the master and the apprentice are processing a batch of parts. After a period of processing, the master processed 84 parts. The apprentice made 63 parts. The master works more than the apprentice, accounting for 1/28 of all tasks. How many parts are there in this batch?
Suppose this batch has x parts.
13. A barrel of oil, after eating 7/ 10, added 15 kg. At this time, the oil in the barrel is exactly half of that in a barrel. How much does this barrel of oil weigh?
14. A train runs from Shanghai to Tianjin, accounting for 3/5 of the whole journey. If you drive at 106 km/h, you can reach Tianjin in five hours. How many kilometers is the railway from Shanghai to Tianjin?
15. There are 46 students in grade six who participate in math interest groups, among which 4/5 girls are 3/2 times as many as boys. How many boys and girls joined the interest group?
16. It takes Zhang Hong five hours to copy a manuscript. This manuscript has been copied by others 1/3, and the rest was given to Zhang Hong. How many hours does it take to copy it?
17. Two trains leave from two cities 600 kilometers apart at the same time. One train runs at 60 kilometers per hour, and the other train runs at 75 kilometers per hour. How many hours will the two trains meet?
After 40/9 hours, the two cars can meet.
18. A motorcycle travels 64 kilometers per hour. It takes 3/4 hours to find this speed from a to b. What is the distance between a and b?
19. The fruit shop sold a batch of fruits in two days. On the first day, 3/5 of the total fruit weight was sold, 30 kilograms more than the next day. How many kilograms are there in this batch of fruit?
20. Jessie Primary School has 9 10 students, seven quarters of whom are girls. How many are girls? How many boys are there?
2 1. A rectangular piece of land is 60 meters long and 2/5 wide. What is the area of this land?
22. The ratio of red goldfish to black goldfish in the goldfish pond is 7:3. There are 9 black goldfish. How many red goldfish are there?
Grade 23.6 students 132, in which the ratio of male to female students is 6: 5. How many boys and girls are there in the sixth grade?
24. The ratio of A to B is 2:3, and the ratio of B to C is 4:5. Find the ratio of a to C.
25. The number of trees planted in Jiefang Road Primary School this year is 65438+ 0.2 times that of last year. Write down the ratio between the number of trees planted in this primary school this year and the number of trees planted last year.
Last year, the ratio of the output of color TV sets to the total output of TV sets in a TV factory was 9/20. Last year, * * * produced 250,000 TV sets, including how many color TV sets?
27. Workers in a factory account for two-thirds of the total number of employees in the factory, technicians account for two-ninth of the total number of employees in the factory, and the rest are cadres. Write down the proportion of workers, technicians and cadres in this factory.
The number of students in a class is between 40 and 50, and the ratio of male to female is 5:6.
How many boys and girls are there in this class? ..
29. The ratio of science and technology books to literature and art books in the library is 4: 5. After purchasing 300 works of art, the ratio of science and technology books to literature and art books is 5: 7. What percentage of literature and art books have increased?
30.100g sugar water just fills a glass, including10g sugar. Pour out10g sugar water from the cup, and then fill the cup with water. What's the ratio of sugar to water in the quilt?
3 1. There are only 175 students in grades 5 and 6. Divide into three groups to participate in the activities. The ratio of the first group to the second group is 5: 4, and the third group has 67 people. How many people are there in the first and second groups?
32. There are 465 students in a school, of whom 2/3 are girls and 20 are less than 4/5 boys. How much is the male and female?
33. For a manuscript, 1 7 was typed on the first day, and 2/5 was typed on the second day. The next day was nine pages more than the first day. How many pages are there in this manuscript?
34. On a piece of land, the aspect ratio is 8: 5, and the length is 24 meters more than the width. How many square meters is this land?
If the length is 8 and the width is 5, it is more than 3, which is 24 meters.
35. If there are 25% more boys than girls, how many girls are less than boys?
36. This breeding factory has raised 65,438+0,987 pigs this year, which is three times less than that of last year, that is, 245 pigs. How many more pigs have been raised this year than last year?
37. The ratio of Xiao Wei and Xiaoying's donation to Project Hope is 2:5. Xiaoying donated 35 yuan. How much did Xiao Wei donate?
38. All three averages are 8.4, of which the first number is 9.2, and the second number is 0.8 less than the third number. What is the third number?
39. There are two ropes. The length of the first rope is 1.5 times that of the second rope, and the second rope is 3 meters shorter than the first rope. How long are these two ropes?
40. The construction team built a road, and the repaired length and the remaining ratio were 4: 5. If you build another 25 meters, it will just reach the midpoint of this road. What is the total length of this road?
4 1. A factory plans to use 54 tons of coal in June. In the first half of the month, the average daily coal burning was 1.6 tons. If the remaining coal burns 1.5 tons per day, how many days can it burn?
42. In the "three jumps" activity, the number of people skipping rope is three times that of kicking shuttlecock. It is known that there are more people skipping rope than kicking keys 18. How many students are there in skipping rope and kicking shuttlecock respectively?
43. The shop has a batch of sportswear. I sold 35 pieces on the first day and 28 pieces on the second day. The next day's income is less than that of the first day 168 yuan. How much did each sportswear cost?
44. The sewing group has 27.8 meters of cloth. It is planned to make 8 sets of adult clothes first, and the rest of the cloth will be made into children's clothes. According to1.4m fabric, how many sets of children's clothes can be made?
Xiao Ming read a 450-page book. For the first three days, he read 30 pages a day, and the rest read 40 pages a day. How many days does it take to finish reading this book?
46. A car from A to B travels 120km in the first two hours and 2 10km in the last three hours. How many kilometers per hour do you drive on average?
47. A road construction team 13 people will repair 9.75 kilometers of roads in three days. How many kilometers will 15 people build roads in five days if everyone's work efficiency remains the same?
48. The students donated clothes to the disaster area, 890 pieces for the first time and 950 pieces for the second time. How many pieces were donated twice?
49. The school held a skipping contest. The fourth-grade group jumped 800 times and the fifth-grade group jumped 950 times. How many times did the fifth-grade group jump more than the fourth-grade group?
50. The school held a skipping contest. The fourth grade group jumped 800 times, and the fifth grade group jumped more than the fourth grade group 150. How many times did the fifth grade group jump?
5 1. This plane flies 360 kilometers per hour. How many kilometers do you fly in 7 hours?
52. The kindergarten bought 36 Jin of apples, 12 Jin of pears. How many times does the apple weigh?
53
Kindergarten bought 12kg pears, and the weight of apples is three times that of pears. How many kilograms of apples are there?
54. The kindergarten bought 36 kilograms of apples, which are three times as heavy as pears. How many kilograms of pears are there?
55. Party A, Party B and Party C plant trees in plots A and B respectively, with 900 trees in plot A and 250 trees in plot B 1 250. It is known that Party A, Party B and Party C can plant 24, 30 and 32 trees every day, of which Party A plants trees in plot B, and Party B plants trees in plot A first, and then moves to plot B. ..
56. There are three grasslands with an area of 5 15 and 24 mu respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 10 cows for 30 days, and the second grassland can feed 28 cows for 45 days. How many cows can eat on the third grass for 80 days?
57. A project, contracted by both parties, can be completed in 2.4 days and needs to be paid 1800 yuan; Contracted by Team B and Team C, it can be completed in 3+3/4 days, and it needs to be paid 1500 yuan; Contracted by two teams, Party A, Party B and Party C, it can be completed in 2+6/7 days at a cost of 1.600 yuan. On the premise of ensuring the completion within one week, which team will spend the least?
58. There is a rectangular iron block in the cylindrical container. Now turn on the tap and pour the water into the container. In 3 minutes, the water surface is just above the top of the cuboid. /kloc-After 0/8 minutes, the container has been filled with water. It is known that the height of a container is 50 cm and the height of a cuboid is 20 cm. Find the ratio of the bottom area of a cuboid to the bottom area of a container.
59. Two bosses, A and B, bought a dress at the same price, and B bought 1/5 sets more than A, and then they sold it at 80% and 50% profits respectively. After both of them were sold out, A still made more profits than B, just enough for him to buy 10 this fashion, which A originally bought.
60. There are two water pipes, A and B, and water is injected into two pools with the same size at the same time. At the same time, the water injection ratio of A and B is 7: 5. After 2+ 1/3 hours, the sum of the water injected into A and B is just a pool. At this time, the water injection rate of pipe A is increased by 25%, while pipe B remains unchanged.