2。 Huanhuan and Showtime like collecting stamps. They have their own stamps. Huanhuan took out 1/6 Xinxin, Xinxin took out 1/5 Huanhuan, each with 240. It turns out they have their own stamps. How many/much?
The school planted trees, poplars and willows on May 9th. Then I bought 20 poplars. This is a willow, and the ratio is 15: 1 1. Trees have been planted in the school. Trees?
4。 The park bought three seedlings. The ratio of pine, poplar and willow, which accounts for 30% of the total, is 2:5. There are more than 40 known willows than pine trees. Do you always buy seedlings?
5。 B, C, the welfare field will build a drainage channel with a length of 1000 km jointly built by three villages. The ratio of Abing Village is 3: 1, which is 3/4 of that of B Village and 2/3 of that of A Village. The village was allocated welfare fields. Kilometers, every repair?
6。 Students in our school. 4, 5, 6, 2/3, the ratio of the four sixth grades is known to be 3:5. Three quarters of the fifth level is the fourth level equal to two thirds. How many people are there in the fourth grade of primary school?
7。 The price of a set of tables and chairs in 300 yuan is less than 7/11of table. How much are the tables and chairs?
Eight tasks were planned to be completed in 10 day, but actually completed in 8 days, a fraction of the working time? A small part of work efficiency?
9。 Tomato harvest, orchard picking 3/8, there are more than 24 kilograms, packed several baskets, picking the rest, just packed 6 baskets. How many kilograms of tomatoes do you always choose?
10。 Some factories transfer18500 men out of 1300 workers to recruit women workers, which means that the number of male and female workers is equal. Q: How many people were there in the original factory?
1 1 A, B and C three students do math problems, which is called A 6 doing B, C A 2 times or more B 22. How many questions did they do?
12。 A, b each book, if A to B 45 equals two books, B, A 45, A is twice as much as B, do you have two books yourself?
13。 Shopping school 60 square meters lawn, 4/5 square meters has been paved, how many square meters of stores are left?
14。 The 60-square-meter lawn of the school store has been paved for 4/5. How many square meters has it been paved? How many square meters are left?
15。 The school will dig an 80-meter-long sewer. The first day will dig 65438+ 0/2 of the total length of the second day. How many meters will be dug in these two days? How many meters are left?
16 A and b? A box of 50 watercolor pens, its110, how many are there in a box of two boxes of watercolor pens?
17。 In the survey of students' employment intention in a school, 3/5 students, 3/4 students are boys, 1/20 boys want to be teachers, the school wants to be teachers' boys, and then a few girls in the whole school want to be teachers?
18。 Xiaoming reads story books, 1/9. The first day he read the book, the next day he read 24 pages. The number of pages he saw these two days is 1:4. How many pages are there in this book?
19。 There are two baskets of apples with a total weight of 44 kilograms. The first basket is the fifth basket, and the second basket contains 2.8 kilograms of apples with the same weight. It turns out that the two baskets contain apples per kilogram.
Twenty two-way teams completed the task by repairing 45 kilometers of roads. Three-fifths of the repairs are equivalent to three-quarters of those of Team B. How many kilometers have these two teams repaired?
2 1。 I read 36 people in the school library, and girls accounted for 4/9. Then there are some girls, and now the number of girls is 3/4. How many girls are there after all the reading and searching?
22。 The clothing store bought two clothes, each of which was 120 yuan, but it earned 20% and the other one was accompanied by 20%. Do you ask the clothing store whether to make money or lose money by selling two clothes?
23 1360 poplar, fruit tree and peach tree. Poplar is reduced by 40%, fruit tree is reduced by 70, peach tree is donated by 25% to work overtime, and then try to plant three trees. Find three trees, many trees.
24。 There is a big watermelon, which has been eaten for 3/5, Bajie, and the rest of the watermelon sand is disgusting. After eating half, Tang resented Wukong. How many watermelons did Wukong eat?
25 baskets, four kinds of fruits, two fruits, an apple, a pear, eight fruits, bananas and oranges. Fruit basketNoNo. 10/0?
There are 26 people in the art category, and the number of absentees is 1 the number of people who attended1on the afternoon of October 23rd, so11. How many people are senior in the office?
Red Star Primary School planted trees, completing three-eighths of the plan on the first day and the remaining two-thirds on the second day. On the third day of planting trees, it exceeded the plan by a quarter. How many trees were planned to be planted?
28。 There are 62 red, yellow and blue balloons, of which three fifths are red balloons, 24 are blue balloons, red balloons and yellow balloons.
29。 Among the 36 students studying in this school, this is a female student on April 9. Then a few female students, three-fifths of them, and then a few girls?
30。 After some teachers and students handle the same batch for a period of time, the main processing is 84 63. Apprenticeship handling. Apprentices, who account for all the task owners, handle more, only the part of 1/28 group, the total?
3 1 Xiao Ming read a book, the first day he saw 28, and the next day he saw this book 1/5. In two days, he read three-eighths of the whole book. How many pages are there in this book?
32。 A batch of fertilizer weighing 200 tons. 1/4 of the total, and the rest fertilizer is 2: 03. How many tons of chemical fertilizer do Team A and Team B enjoy?
33。 B's 560 tons of grain, if A's grain is shipped to B, how many tons of grain does B's grain equal to the original A and B respectively?
It is more open for two trains to leave two stations at the same time. The speed of a car is 56 kilometers per hour, which is the speed of a 7/8 B car. After 2.5 hours, the two cars dry for 35 meters. How many kilometers of railway are there between the two stations?
35。 Wang Li, it takes 28 minutes to walk from home to school and 8 minutes to ride a bike. One day, he goes to school by bike. After walking for three minutes, his bike broke down and he immediately walked instead. How many minutes is his bike behind the whole car?
36。 Line, a car and b car drive from two places at the same time. The speed of armored vehicle line is 40 kilometers per hour, which is full compared with that of B-car steamed bread 1.5 hours' drive and two cars 1.5 hours' drive. Two places a few kilometers away.
37。 Eight days to complete the road maintenance task. The team that planned to build roads in the first three days completed 2/5 of the plan. On this basis, can the road maintenance task be completed a few days in advance?
38。 From point A to point B, the car traveled a full 1/4 on the first day and a full 1/5 on the second day, and the remaining distance exceeded 1.20 km. How much is the lunch for the rest of the trip?
39。 The distance between a car and b car from two places at the same time is 300 kilometers. After 2.5 hours, it is also called fully armored vehicle to drive 47 dry meters/hour. Except for 25%, the speed of B cars is kilometers per hour.
40。 In two cities with a distance of 1005 dry meters, the speed of trucks is 3/4 of that of buses, and the distance between the two cities is 60 kilometers.
4 1。 A train from point A to point B, the first hour of the journey, 55 kilometers, the second hour of the whole series 1/3, when the train just reached the midpoint between the two. How many meters did A and B walk?
42。 Two wires are cut, the first one is 1/5, and when the second one is connected to the total length of 28 m and 242 m, the two wires are of the same length. How long is the original wire?
43。 14 The number of workshops A, B and C is less than that of propionic acid production workshop, and more than 25% of propionic acid workshop is in workshop B, and the number of workshops A and B is known.
44。 Xiaohua's age this year is 65438+ 0/4 of his father's age, and his father's age is 3/5 of his grandfather's age. Grandpa Xiaohua's father is 32 years old this year. How old is the floret?
45。 Line A accounts for 3/8 of the total length at first, and 2.2 meters at the second time, which is 5/6 of the total length of the two lines. First, flower rice?
46. 1 block of wood accounts for 1/3 of the whole length first, then it is thrown to 3.5 m, and the remaining whole length is 1:4. How many meters has this wood gone?
47。 Construction of a road section construction team. On the first day, the total length of15 exceeded 10 meter, which was 2/7 of the total length. The next day, there were 53 meters unfinished. How long is this paragraph?
48. Two teams work together on a project, A and B, which can be completed in 10 days. One team worked for four days, and Team B worked for six days to finish the project. How many days did Group A do this project alone?
49. Multiple copies, with three students, A, B and C. The total number of A shares in 1/5 and the total number of B shares in 1/4 are 7? * * * Enjoy the remaining 1/2, and the remaining books are only 1/8 in total. The total number of books?
50, a road can't be repaired by 3/2 meters. If you build 30 meters, how many meters will it be without the 7:3 ratio?
5 1。 The escalator runs upward at a uniform speed. A boy and a girl got off the escalator at the same time. The boy is twice as fast as the girl. The famous boy took 27 steps to reach the top of the escalator and walked 18-year-old girl to reach the top. Could you tell me the level of the exposed part of the escalator?
Piles of apples, if the first one is more than the second one, the remaining one sells for 2/3, and the second one sells for 50 Jin. How many kilograms are left in this pile of apples?
53。 Two cars, A and B, drive from A to B at the same time without stopping? Among A and B, it is known that the speed of A car is faster than that of B car. How many times did the two cars meet for the first time and the second time to reach the speed of B car?
54。 A ship can sail from A to B, and sail from * * * for two hours. The multi-line speed is 8 kilometers per hour, and the second hour is 6 kilometers higher than the first hour. Seek distance of a and b
55 A and B, two cars, depart from A and B respectively, and there is a continuous round trip fee in both places, which is called the speed of armored vehicles is 15km/h, and the position difference between the third and fourth cars when A and B reach 100km. Find out the distance between Party A and Party B..
56。 Someone moved the escalator from top to bottom, and used the escalator that took 7 minutes and 30 seconds to walk from bottom to top. It only took him 1 min for 30 seconds. If this person doesn't leave, take the escalator from bottom to top. How long will it take? In case of power failure, how long will it take to go down the escalator?
57。 The bottom area ratio of double-barrel containers A and B is 5:3, the water depth of container A is 20cm, the depth is 10cm, and the water depth of container B is 20cm. What is the unit in centimeters when we study the equal amount of water in two containers to make the depth of water in two containers equal to the depth of water?
58。 A and B are 207 kilometers apart. The speed from A to B is 60 km/h and 54 km/h at 8: 00, and the speed from B to A is 48 km/h at 8:30. Are there any propionic acid cars equidistant from cars A and B?
The perimeter of 59 is 130 cm. If the width of 59 is increased by the length of 1/5, it is decreased by 1/8 to obtain a new rectangle with the same perimeter. Seeking the original area? The rectangle of.
60。 Use a rectangle with an aspect ratio of 5:2 and a diagonal length of 29 cm. Did you find the area? Rectangular.
An orchard has 6 1 fruit tree, and the result is not more than twice that of last year. 60. There are 160 fruit trees this year. As a result, there are only 5 fruit trees in the orchard.
62。 Xiaoming walks from point A to point B, while Li Gang walks from point B to point A by motorcycle. Meet with the two prime ministers for 0.48 minutes and return to point B immediately after reaching the ground. After the first meeting 16 minutes, I caught up with Xiaoming. Just stored in A and B, so when Xiaoming arrived in B, how many times did Li Gang and * * * catch up with Xiaoming?
63。 Similarly, take 100 meters, Xiao Ming takes 180 steps and 120 steps to find his father. Father and son are in the same direction, from the same place, it seems that every step, and then after the father walked back 450 meters, how many steps did he meet Xiao Ming at the same time?
64。 Between the two ports, the speed of water is 6 kilometers per hour. It takes four hours for a ship to sail, and it takes seven hours for this voyage. Find the distance between two ports.
65。 Three cars, B and C, go from A to B and then to B at a certain speed, catch up with C at night 10 minutes, and leave at night 10 minutes. Will AB and QA start catching up with B in a few minutes?
66。 The efficiency ratio of A and B to finish the work armor is improved110, and the efficiency ratio of B is improved 1/5. Cooperate for 6 hours to finish the work. If A needs 1 1 hour, how many hours does B need to do?
67。 A, B, C, D, E, five students stand on the same level. Their hands and the China * * * producer holding 20 flags now know that the students standing in c++ have the right to hold the flag of 1 1, and the students standing on the left hold the flag of 10 and stand on the surface of 8. Do they have some small signs?
68。 Xiao Ming ran a lap on the 360-meter-long circular runway. It is understood that in the first half of this year, his time was 5 meters per second and 4 meters per second. In the second half of this year, I asked him how long it would take after half a year.
Xiaoying got off the zipper of the train by measuring the length and speed. Xiao Ming claimed that when he was there, they spent two stopwatches smiling at the train, and it took 15 seconds to record from the first wire to the pole behind the vehicle.
The time spent on the second thread is 18 seconds. The known distance between two telephone poles is 60 meters and the train, full length and speed.
70。 Xiaoming walked half the way from home to school. Half a drive home from school, the first 1/3 time is travel, and the second 2/3 time is walking to school, 20 minutes more than at home. How many kilometers does Xiaoming walk from home to school?
7 1。 Math exercises * * * were held for 20 times, with a total of 374 questions. The number of questions each time is 16, 2 1, 24, 16, 2 1, 24 questions. How many times did you ask?
72 divided by 2 is an integer exceeding 1, and the quotient obtained by dividing it by 5 I 4 I 1 6. Then divide by an integer and then divide by 60 to get the quotient. What is the remainder?
73。 The young pioneers planted twice as many apple trees as pear seedlings on campus. Each pear seedling is planted with 3 trees, and each apple seedling with more than 2 trees is planted with 7 trees and 6 trees. Ask for the total number of young pioneers? Total number of apple and pear seedlings?
74。 Someone drove 200 kilometers from City A to City B. At first, his speed was 56 kilometers per hour, but because the car broke down, it would take an hour and a half to fix it. In order to arrive on time, he must accelerate to 14 km per hour. After that, how many kilometers did he repair the car?
75。 A and B set out from A and B at the same time, respectively. On the contrary, the speed of B is 2/3 of that of A moving forward, and then they meet, A arrives at B, and when B arrives at A, it immediately returns to the known position. The two distances encountered for the second time are 3000 m. Find the distance between A and B..
76。 For ships between ports A and B, it is known that the speed of the ship in still water is 15 km/h, and the acceleration time is usually 2: 1. One day, because of the rain, the current was twice that of the ship. From the common 10 hour, how many kilometers is Hong Kong from A and B?
77。 In the college entrance examination, students only take13, the average admission level of six points is higher than the admission score, the average score of the admitted students is lower than the admission score 15, and the average score of all candidates is 80 points. What is the admission score?
78 groups of students move bricks. If 12% people take every step, 75% people will leave the last148; 30% people move 8 in each movement, and everyone else moves to 7, so there is 20 left in the end. Total number of students required? Bricks?
79 A and b, two cars facing each other from a and b at the same time, are called armored vehicles. The ratio of speed to speed b is 4:3, and the time between C and A and B is 8:00 and 15:00 respectively. When did C, QA and B meet?
80。 Win a game of chess, scoring method, two points, the negative side gets 0 points, and the two teams draw 1 point. Every player and other players know that the player is 10 times, boys and girls play once a game, but the total score of girls is only 4.5 times. How many girls were asked in the competition? Girls always have a few minutes.
8 1。 The arithmetic average of some natural numbers is 10. If it is the largest arithmetic average removed from these numbers, it leaves 9; If you divide by the arithmetic average of, the rest is 1 1, then what is the smallest number? What is the maximum quantity?
82。 How many students are there in classes 35 and 23 of the Young Pioneers? How many more girls are there in the Young Pioneers class than boys who are not young pioneers?
83。 Xiaodong is going to visit the ape-man site in Zhoukoudian. Three hours earlier than riding a bike. If his car is driving at a speed of 40 km/h, then if he is walking at a speed of 8 km/h, how many kilometers is the starting point from Xiaodong after 5 hours?
84。 Two ships, A and B, are sailing 90 kilometers away from the river. If they face opposite lines, they will meet in three hours. If they catch up with the ship on the 15 hour line.
B boat. Find the speed of two ships in A and B in still water.
There are students in Class 90 85, Grade Two, including Young Pioneers 7 1. A group of young pioneers account for 75% of the total class, and the number of second-class young pioneers accounts for the fifth/sixth grade of the class. How many people are there more than the second-class Young Pioneers?
86。 A container is filled with water, big, medium and small balls. The first time the ball sank into the water, the second time it was taken out, the ball sank into the water, except for the ball, the ball and the ball, which were immersed in the water for one third of the time. Now it is known that every time water overflows from the container, the first time is 1/2, the third time is 1.5 times the volume ratio, and the second time is. Seek three goals.
87。 Someone climbed the mountain for two hours and returned to 2.5 hours. His climbing speed is 3000 m/h, which is 4500 m/h less than the previous year. How far is it to climb this mountain?
88。 Steel raw materials, each 7.3m, each group leader 2.4m, 2. 1 m and1.5m steel bars are placed on the shelf. Now tie the steel bar? There are 100 groups of ribs. At least use raw materials, right? How many/much?
89。 There are also copper-zinc alloys, in which the ratio of copper to zinc is 2:3. Now we know that the proportion of zinc is 6 grams, and after the new copper-zinc alloy is melted, there are still 36 grams.
90。 Xiaoming usually goes to school on foot. One day, he wanted to do some exercise. The sprint speed of the front 1/3 is four times that of walking. After jogging for a while, walking speed is twice as fast as walking. Xiao Ming, who was assigned to school, was 35 years earlier than usual. How many minutes does it take Xiaoming to walk to school?
9 1。 Age ratio B A, B, C trio, armored twice, twice, 2 years old, 3 people age 109 years old, 3 years old B group age ratio C age calculation, B, C age.
The speed of express 92 at 60km/h is very slow from Station A to Mile Mile. After 40km/h and 1.5h, two cars will be satisfied when they get out of a station on the Mile Mile Line. At the midpoint of the intersection, two stops are 70km. How many kilometers is it from Station A to bilibili?
93。 Two cars, A and B, have left school and are driving at the same speed. At 8:32, the distance between A train and school is called three times that of B, and at 8: 39, the distance between A train and school is called two times that of B. Find the time when A train leaves school.
/kloc-a working group in 0/994, each worker worked in his post for 7 hours to produce a batch of parts. If the positions of worker A and worker B are reversed and other things remain the same, then advance 1 hour. If the positions of workers C and D are reversed and other things remain the same, the whole batch of parts will take a long time to complete. If the jobs of workers C and D are exchanged, other things being the same, it may be one hour earlier.
95。 10 Rectangular building blocks 7 cm long, 5 cm wide and 3 cm high are placed in a box. What is the minimum surface area? What is a cuboid?
96。 Perfect Circle only sells two kinds of tickets: individual ticket, 5 yuan, 10 person, group ticket, 30 yuan. There is a discount of 10% for each group ticket with more than10 people. (1)A-share park, 45 people bought tickets, at least according to the above regulations, how much should they get? (The park in Unit 208B bought tickets, at least according to the above requirements, because how much?
97。 A, B, C, take an exam, ***260 points, which is called 1/3, B's 1/4, and C's half score is equal to 22 points, so what is C's score?
For a single project, A and B worked together for 4 days, and then B worked alone for 5 days, which took one more day to complete the project than B 1/30. How many days does it take for A and B to do this project alone?
99。 Two candles (burning at the same time and the same length), both of which are 56 cm in length, were also lit for some time. A short candle lights a long candle, and after the long candle is lit. How long did it take, two thirds of the short candles lit the long candles?
100。 A batch of apples is packed in 20 baskets on average, and each basket contains more than 1/9. How many baskets can you save?