2。 There are three grasslands with an area of 5 15, and 24 mu of grass is as thick as grass. The growth rate is that the first grassland can feed 10 cows for 30 days, and the second grassland can feed 28 cows for 45 days. How much can the third cow eat for 80 days? .
3. Party A and Party B shall complete the contract 2.4 days after signing, and pay 1.800 yuan; Contract from Team B and Team C, completed in 3 +3/4 days, requiring 1.500 yuan; On the premise of ensuring the completion next week, which team should be selected to contract alone, with the lowest cost and 2 +6/7 days to complete, paying 1.600 yuan?
4。 Put a cylindrical container and a rectangular iron block together. Now turn on the tap and irrigate the surface of the container for 0.3 minutes, and the top surface of the cuboid has not been seen yet. After another 18 minutes, the container was full of water. Isn't a rectangle with a height of 20 cm and a height of 50 cm just for rectangular areas and containers? The bottom area of the bottom knows the height of the container.
5. Two bosses, A and B, both buy at the same price, and B buys multiple copies of BEL/5 from 80% and 50% of the profit from the price sale, so A and B are respectively. After all, after more B, it is enough for him to buy 10 sets like this. How many sets of profits from buying this fashion are just another part of profits?
6. There are two pipes, A and B respectively. For two pools with the same size, at the same time, the ratio of A, B and water injected into the two pipes is 2+ 1/3 hours after 7:5, and A and B are injected into the pool, which happens to be a pool. At this time, A is 25% faster, and the prices of water pipes and water pipes B remain unchanged. Then,
7。 Xiaoming goes to school from home in the morning. When he ran half the distance, my father found a lost math book at home and sent it to Xiaoming on horseback. When he was arrested, Xiao Liang still had 3/ 10 unfinished journey. Xiao Ming took his father's car, and his father hurried to school, so Xiao Ming went to school alone five minutes earlier than walking. How long does it take Xiaoming to walk from home to school?
8. Car A and car B both come from A to B and C. A and B are equal to the distance between B and C. B. 80 The speed of armored vehicle% B-car BEL, a well-known car, left 1 1 minute in advance, but stayed in B for seven minutes. A car kept driving towards C until the last car from B to C arrived four minutes later. Then, a few minutes after B car set off, A car overtook B car.
Road sweepers 9, a and b perform cleaning tasks between things. It takes 10 hour for one person to wash armored vehicles, and 14 hour for b person to wash cars. The two cars face each other from the east and west. When a car meets the tail-end of a B car 12 km, how many kilometers is it from east to west to the urban area?
10。 At present, there are 3 ton containers 4, 2.5 ton containers 5 and 1.5 ton containers 14 and 1 ton containers 7. So the required vehicles transport all containers at once with a vehicle with a capacity of at least 4.5 tons?
Comprehensive Training of Mathematical Application Problems in Primary Schools (02)
1 1。 Mentoring 170 pieces. The number of processed parts is 1/3, and the number of processed parts exceeds 10. How many parts is the master machining apprentice?
12。 The speed of cart and trolley from point A to point B is 80%, and the speed of trolley is 80%. Well-known large cars set off more than 17 minutes in advance, but continued to point to point B five minutes before the two midpoint stations. However, the bus set off without stopping, went directly to point B, and in the last four minutes, arrived at the early stage of the bus. B It is known that we will catch the bus from A. What time does the bus leave in the morning 10?
13。 The manuscript needs to be typed alone 14 hours to complete, and B needs to be typed alone for 20 hours to complete. If you use 1 hour to play 1 hour, then change one to b, and then play the following b 1 hour. ...........................................................................................................................
14 There are three yellow balloons in 2 yuan, two in 3 yuan, and 32 balloons in school. Balloons cost less than four yellow balloons. Which school has more money to buy balloons?
15。 The sailing speed is 60m/min. At the speed of 20m/min, the water in the river flows from the upstream of a port to the downstream of a place, and then returns to this place. The ship * * * enjoys 3 hours and 30 minutes. What is the total meter from upstream to downstream?
16。 Warehouse A contains 43 tons of flour, and warehouse B contains 37 tons of flour. If the flour in warehouse B is filled in one warehouse and the other warehouse is full, the remaining storage capacity of warehouse B accounts for1/2 of the storage capacity of warehouse B; If the flour in granary A reaches B, and then granary B is full, if granary represents the capacity of 1/3, how many tons of flour can each granary hold?
17, when the number of B is equal to the number of ethylene and propylene provided by the supplier, the remainder is 2, A and B are two numbers and 478, what is the number of A, B and C?
18。 If the speed of a car from point A to point B is reduced by 10%, which is one hour later than the scheduled time, if the original speed is 1 80km and the speed is increased by 20%, then it is1earlier than the scheduled time. Distance a, how many kilometers are there between two B?
19。 Organize a phalanx team in the school competition. If there are 60 students in each class, there must be at least 4 classes in the square. If there are 70 people in the class, there must be at least three students in the square. How many people should make up this square at that time?
20, A, B and C lathes process square and round parts, which is called a lathe processing three parts with two circles each; B, lathe processing four parts each have three circles; Each propylene lathe uses four circular lathes to process five parts and 58 circular parts in three days. The square ratio of the number of parts processed is 4: 3:3, so what is the total number of lathe parts in these three days?
Comprehensive Training of Mathematical Application Problems in Primary Schools (03)
2 1。 The loop conductor is 30 meters long, and the length of the 3-wire B is cut into 5. If the length of the remaining wire was cut to 0.4 meters at that time, and the difference was several meters, the length of the 2-meter-long wire was equal to A?
22。 The transportation company will go to Station A, bilibili and secondary building materials. Class A materials each weigh 700kg, totaling 120, and Class B building materials each weigh 900kg. ***80 It is understood that each car can carry up to 40,000 tons, so five cars in the same car can transport at least dozens of times at the same time.
23。 Wang's distance from home to school is longer than that from the stadium 1/4. After watching the game, he walked home in 17 minutes, and then had a short rest on the court. The next day, he walked for 25 minutes to school. Its speed is still 15 meters from the gym. How many meters slow is it from Wang's home to school?
24。 Master and apprentice cooperate to complete a project, which is more than master's110. Being an apprentice to an individual improves work efficiency 1/5. Two cooperations completed 2/5 of the whole project in 6 days, and then the apprentice has finished it for 6 days by himself, so one thirtieth of the project is still unfinished. If the project is done by the owner, how many days will it take?
25。 Grade six students planted five kinds 100. It is known that the number of trees that can't be planted in each category is the same, and the ones that are less according to the ranking are just one, two, three, four and five categories. They know that the number of trees planted in a group is two, the number of trees planted in three classes, the number of trees planted in two classes is four, and the number of trees planted in five, so at most three classes are planted?
26。 A 13 hour runs kilometers, running at the speed of 1 1 kilometer per hour. B and B Bell ran for more than 20 minutes, and B Bell ran more than 200 kilometers as a result. How many miles has Otsuichi run?
27。 There are two cylindrical containers of equal height, A and B, with radii of 6 cm and 8 cm respectively. When the container is full of water, container B is empty, and all containers of water AB are put into the container. The measured depth in container B is 7/82 cm higher than the depth of the lower part of the container. Is the height of the container in centimeters?
28 104 tons of goods, transported by 9 tons of trucks. Well-known cars need 1 hour for each round trip, and the actually installed cars exceed 1 ton, each time, and then several hours in advance. 29。 Teacher, on the first day of processing part 225, the second day after adopting the new technology, the master increased by 24% compared with the processed parts, with a year-on-year increase of 45%. The apprentice processed 300 parts on the first day. How many parts will the next master process? How many parts does the apprentice process?
30。 The sixth-grade students of Fendou Primary School held a camping training in Baihua Mountain, which increased the trip by 2 kilometers a day. I walked for four days and came back for three days. How many kilometers is Baihua Mountain from the school? .
Comprehensive Training of Mathematical Application Problems in Primary Schools (04)
3 1 the standard charge for a place is: if the monthly electricity consumption does not exceed 50 degrees, 50 points will be charged; If it exceeds 50 degrees, the cost per kilowatt hour will exceed 80 cents per month. User A and User B paid 33,000 yuan more this month. A and b are respectively connected with multiple power supplies.
And 2-hour batch processing of parts 32. When Master Wang left, the plan was 160 copies. The machine is broken, and the efficiency is higher than the original 1/5. As a result, the task that could have been completed was 20 minutes later than originally planned. How many parts are there?
33。 Mother gave some money and bought a red card. There are three cards, A, B and C, each card is 1.20 yuan. Use these cards to buy more than eight B-series cards, and buy 6 B gamma cards instead of buying cards. How much did mom give Hong? How big is the B of each card?
34。 An old man has five sons and three houses. Before he died, he made a will and gave these three houses to his three sons. As compensation, each of the three sons got a family 1200 yuan, and the two sons who were not assigned to the house came out. Everyone says this distribution is fair and reasonable, so how much is each house worth? .
35 Xiaoming and Xiaoyan have less than 20 albums. If Bob Xiaoyan A realized this, this album would be a little twice as big as Xiaoyan; If Xiaoyan Xiaoming A realizes this, the next album will be smaller and swallowed three times. How many albums are Xiaoyan Xiaoming and?
36 red, yellow and white balls and three red balls 160. If you remove 1/3 yellow balls, 1/4 white balls, 1/5, and then120 remains; . If 1/5 for the red ball and 1/4 and 1/3 for the yellow ball are deleted, what about the original number of the remaining 1 16, Q( 1) yellow ball? (2) How many white balls were there in the original red ball?
37. My father, brother and sister are three years old. Now she is 64 years old. Dad is three times older than my brother, my sister is nine years old and his brother is twice as old. His sister and father are both 34 years old. How old are all three now?
38: B between A and C. An emissary from B to A sent another letter to B after 10 minutes from B. After 10 minutes from ethylene, epoxy AB just found that the two letters were upside down, so he started riding B to A and B to catch up with them. It is known that the speed of A and B is equal to the speed of methyl propionate, which is three times that of B, so how long does it take to transfer letters from departure to return to propionic acid B?
39. There are 94 workers in workshops A and B who process 1998 bamboo chairs every day. Due to different equipment and technology, each worker in a workshop can produce 15 bamboo chairs every day, while each worker in an ethylene plant can produce 43 bamboo chairs every day. How many B's are there in a bamboo chair workshop every day?
40, it takes 10 minutes for a student to walk home from school, and 14 minutes for b student to walk home from school. It is known that it takes more than 1/6 for a guest to go home, and it takes more than 12 minutes for b, so how many meters is b away from home?
Comprehensive Training of Mathematical Application Problems in Primary Schools (05)
4 1。 The cost of a commodity is 72 yuan per piece. If sold at the original price, 100 pieces will be sold every day, accounting for 25% of the profit cost of each project. Then it is sold at a price of 90%, and the daily sales volume is increased to 2.5 times. According to this calculation, the daily profit will increase by several yuan.
42. The speed ratio of the two trains A and B is 5: 4. When the bus left for the station, it was 72 kilometers away. A car started from a station and headed for Mile Mile. The ratio of two trains is 3:4, which is far from A and B. How far is it from A and B?
43。 Both the big monkey and the little monkey are 35. They are picking peaches. When the Monkey King is away, the big monkey can choose 15kg for one hour, and the little monkey can choose 1 1kg as the king's supervisor, 1 hour. No matter the size of each monkey, he can choose 12kg for eight hours, of which only the first and last hours in Monkey King have 4400.
44。 The Olympiad set a certain number of times and won the second prize. It is known that (1)A and B schools won the prize at 6:5. (2) Party A and Party B feel that the school will win the second prize of 60% of the total number of students awarded by the two schools in the coming year. Schools with a ratio of (3)A, B and 5:6 will win the second prize. Ask some award-winning schools to win the second prize of the percentage of schools representing the total number of ethnic minorities?
45。 As we all know, the walking speed ratio of Xiaoming and Xiao Qiang is 2:3, while that of John and Brock is 4:5. It is known that Xiao Gang walked 420 meters, passed Xiao Ming in 10 minutes, and then walked less than a few meters in Xiao Ming's Xiao Qiang in 20 minutes.
46。 Batch processing parts, the daily planning process is 15. After 4/5 of the post-processing tasks have been completed these days, the efficiency of using new technologies has increased by 20%. Therefore, the completion time is 10 days ahead of schedule. How many of these parts are there?
47. A and B run 10,000 meters on the 400-meter circular track. At the same time, from the beginning, the speed was 8 m/s, and the speed of B was 6 m/s, and in the same direction, for each capture, after the speed of 2 m/s decreased, the speed of B decreased by 0.5 m/s ... This situation continued until A B found himself catching up from behind for the first time and increased the speed to 0.5 m/s until the end. Leader, when it reaches the end, how many meters away from the success of others?
Xiaoming goes to school from home. If he walks 1.5km for more than an hour, he can only walk 4/5 of this part in time. If he has less than an hour to walk 1.5 kilometers, then his lonely journey is a little more than before from time to time.
49. A, B, C and D are now 64 years old 2 1 year old, and a 17 years old b; . One is 18 years old, three times the age of propylene, and now the age of several people. Years old?
50。 When processing parts in batches, complete 1/3 at a time. Due to technical improvement, the productivity increased by 10% four days ahead of schedule, and the original planned processing was 30% on the day of task completion. How many of these parts are there?
Comprehensive Training of Mathematics Application Problems in Primary Schools (06)
5 1。 The escalator is accelerating uniformly. A boy and a girl are walking on the escalator, which is twice as fast as the boy. Girls already know that boys walked 27 hours to reach the top of the escalator, while girls went to the top of 18. Excuse me, what is the level of the exposed part number of the escalator?
52。 Apples overlap, first sell 2/3 piles, and the second pile sells 50 kilograms. If the first pile takes less than a second, the remaining apples will be piled up, and then Apple will rest with the least kilograms.
53. Both A and B leave from A at the same time, and the round-trip fare between A and B is non-stop. As we all know, armored vehicles are faster than B vehicles, and the first bus and the second bus of both vehicles meet the requirements of heterogeneous℃ in his way. How many times faster is car A than car B?
54。 A ship travels from point A to point B for 2 hours, and then sails when it comes back. Compared with the speed of 8 kilometers per hour of multiple lines, the second hour of multiple lines 6 is longer than the first hour 1000 meters. Find a and b positions.
55, A and B come from two cars, A and B respectively. Between A and B, these two cars keep driving back and forth. As we all know, the speed of armored vehicles is 15 km/h, and vehicles A, B and B meet at the third and fourth places far from the meeting place of 100 km. Find the distance between a and b.
56。 Someone moved automatically and walked along the escalator from the top of the bottom with 7 minutes and 30 seconds left, but he walked up the escalator, and the bottom of the top was only 1 minute and 30 seconds. If this person doesn't leave, how long do you want to take the elevator from the ground floor? If there is a power failure, how many people will come here from the top along the bottom of the escalator?
57。 There are two cylindrical containers, A and B. The bottom area ratio of 5:3 is 20 cm and the depth is 10 cm. The amount of water injected into the two containers is the same, so the depth of the two containers is equal. So the depth is centimeters?
58. Group A and Group B are 207 kilometers apart. A car and B car leave from point A to point B at the same time, and the speed of 60 kilometers per hour is 54 kilometers. When the speed of propylene car is from 8:30 to B to A, 48 kilometers per hour, propylene cars A and B have the same distance.
59. The circumference of a rectangle is 130 cm. If its width increases by 1/5 and its length decreases by 1/8, you will get a new perimeter of the same rectangle. Find the original rectangular area.
There is a rectangle with a length-width ratio of 5:2, which means the diagonal length is 29 cm. The area of a rectangle.
Comprehensive Training of Mathematical Application Problems in Primary Schools (07)
6 1。 The orchard with fruit trees has more than twice as much fruit as last year's 60. As a result, 160 fruit trees have borne fruit five times this year. So the result is only the total number of fruit trees in an orchard?
62。 Xiaoming walks from point A to point B, and Li Gang, a motorcycle travels from point B to point A at the same time. 0.48 minutes after they met each other, they just arrived and returned to point B 16 minutes before. If Xiaoming catches up with point A and point B and keeps walking, then when Bob arrives at point B, he catches up with Xiaoming multiplied by Li Gang.
63。 Similarly, take 100 meters, take 180 steps to Xiaoming, and father takes 120 steps. My son comes from the same place and the same direction. If every step of time is the same, how many steps will it take to see Xiao Ming after Dad walks 450 meters back?
64。 The ship sails between two ports at a speed of 6 kilometers per hour. It takes 4 hours to sail and sail, and 7 hours to sail against the current. Find the distance between the two ports.
There are three cars, A, B and C. From each car, A and B are bound to a certain speed. After more than 10 minutes, B starts to catch up with propylene and propionic acid for 40 minutes. A and B set off in 10 minutes and began to catch up. After 60 minutes with C, they asked for a few minutes and started chasing B?
66. Party A and Party B cooperate to complete a task. Because of good cooperation, it is more efficient for one party to do B than110 and 1/5 alone. Party B shall cooperate for 6 hours to complete the work. If the time required by A exceeds 1 1 hour, Party B shall complete it alone.
67. Five students, A, B, C, D and E, are standing on the same horizontal line with 20 flags in their hands. Now we know that students standing on the right of C hold the 1 1 flag, students standing on B hold the 10 flag, students standing on D participate in the Eight Banners, and students standing on the left of professional students hold the 16 flag. Who are the five students from left to right? How many flags did you each shoot?
68。 Xiaoming ran 360 meters around the track. Tell him to run 5 meters per second before the end of the first half and 4 meters per second in the second half. Why did he use the second half?
69。 The length and speed of a smile are very small. After they got off the train to measure the flight, they spent two stopwatches, a small table and a piece of paper from his English train. The time taken is 15 second. Xiao Ming wrote down that it took 18 seconds to pass through the back of the first wire of the second wire, but the distance between the two poles was known to be 60μm, and the length and length of the whole train were calculated.
At 70 o'clock, Xiao Ming went from home to school, sitting before and walking after; He came home from school, the first time 1/3, the second time 2/3. It takes more than 20 minutes to go home from school. Do you know how far Xiaoming is from home to school?
Comprehensive Training of Mathematical Application Problems in Primary Schools (08)
7 1。 Math exercises, ***20 times, * * 374 questions,16,216,21,24 questions, how many times is it?
72。 Integer frequency is divided by 2 1, divided by the quotient of 54, and then divided by the quotient of 6 1. What is the remainder when this integer is divided by 60?
Pioneer planted apple trees on campus in two ways. If there are three pear seedlings per pear seedling, there are more than two; .. if each race has seven apple trees, and then six fewer trees are planted. Q: How many young pioneers are there? Total number of apple and pear seedlings?
74。 Someone drove a 200-kilometer route from City A to City B, and started with him at 56 kilometers per hour. But it takes half an hour to arrive on time because the car broke down, so he had to increase the speed 14 kilometers per hour to complete the trip in a city many kilometers away from where he repaired the car?
75. Two people, A and B, fly the same flight from A, and B go in opposite directions, and the speed of B is 2/3. After they met, they moved on, reaching B to A and B, and immediately realized the return of A.. The distance between the two famous websites for the second time is 3000 m, and the distance between A and B is found.
76。 Ships, traveling 9 km/h from A and B and in still water, usually use the retrograde and forward time of 2: 1, which is faster than the speed of famous ships between these two ports. Because it rained that day, the speed is twice as fast as before. The ship sailed 10 hour, and asked how far A and B were from Hong Kong.
77。 Only13 students were admitted to the entrance examination of a school, which was 6 points higher than the average admission score. No student was admitted with a score lower than the average admission score 15. The average score of all candidates is 80 points. What are the admission requirements?
78 groups of students move bricks, if you move seven, there will be 12 people, the rest will move five items, and finally148 will be left; If 30 people each have 8 strokes, the rest will move 7 strokes, and the last 20 strokes. How many students are there? How many bricks are there?
79, A and B respectively. The relative line of two vehicles starts from A, which is 4:3 compared with the known armored vehicle speed and speed B B, and C is between A, B, A and B. The time for vehicles to arrive at C is 8:00 and 15:00 respectively. When will cars A and B be satisfied?
80。 In a game of chess, the winner can get two points, the loser can get 0 points, 1 point, and the two people are tied. In every game between each player and other players, players now know that boys and girls are 10 times, but their total score is only 4.5 times, and their scores are girls. How many girls asked for participants? Girls are a little too?
Comprehensive Training of Mathematical Application Problems in Primary Schools (09)
8 1。 There are some natural numbers whose arithmetic mean is 10. If one of these numbers is the largest, the rest of the arithmetic mean will be deleted by 9; If the smallest is deleted, what is the maximum value of the remaining arithmetic mean of 1 1? What is the largest of these figures?
. A class of 8235 people who dare to be the first, there are 23 boys in this class. Compared with boys, how many girls are pioneers?
83。 Xiaodong plans to visit the ape-man site in Zhoukoudian. If he drives at a speed of 40 km/h and then rides more than 3 hours in advance, if he walks at a speed of 8 km/h and then rides more than 5 hours later, how many kilometers does it take from the starting point to Zhoukoudian Xiaodong?
84. Two ships A and B are sailing in a 90km inland river. If the opposite lines meet within three hours, and if they travel in the same direction, the distance between them is 15 hours. In still water, b is the speed of two ships.
85。 There are two ***90 students in Grade Two, including Young Pioneers 7 1. A group of young pioneers account for 75% of the class, and the second-class young pioneers account for 5/6 of the class. Who is it? How many more people are there than the pioneers in Class Two?
86。 There is a container full of water, and there are three balls in it: big, medium and small. The first time the ball entered the water, the second time the ball was driven out, the ball was put into the water, and the third time a small ball and a big ball were thrown into the water. Now I also realize that the water in the container is: the first is 1/2, and the third is 1.5 times. Find the volume ratio of three balls.
87。 Someone climbed the mountain for two hours and came back for 2.5 hours. His climbing speed is 3000 meters per hour and 4500 meters per hour. How many meters, over that mountain?
88。 Each steel bar is 7.3m long, and each part of the steel bar is 2.1.5m and1.5m for every 2.4m steel frame. Steel shelves now need 100 sets, at least how to use the source of raw materials?
89。 There is a zinc alloy in which the ratio of copper to zinc is 2:3. At present, 6 g of zinc is added to know that the new alloy melts 36 g. What is the ratio of copper to zinc?
90。 Xiaoming always goes to school on foot. One day, he wanted to do some exercise. Before the long-distance running, he walked at four times the speed. After a while, he jogged away at twice the speed. For example, Xiaoming 35 was assigned to school earlier than in previous years. How many minutes does it take Xiao Ming to walk to school?
Comprehensive Training of Mathematical Application Problems in Primary Schools (10)
9 1, A, B, C, in which B of A is twice as old as 3 years old, B is 2 years old, 3 years younger than propylene, 109 years old, thus obtaining A, B, C. ..
92。 The speed of express delivery to 60km/h is from point A to mile mile 1.5h, and then climb from leg armor of B to 40km/h to stand out. When two cars meet, the intersection between them is at the midpoint of 70 kilometers. How many kilometers is the distance between Station A and bilibili?
93, A, B and two cars have left the school and are heading for the museum at the same speed. It is known that the distance from school at 8:32 minutes is three times that of bus B and 8: 2 times that of armored vehicle 39, so it is time to find a car to leave school.
94。 There was a working group that produced a batch of parts when they worked for seven hours. If the positions of workers A and B are reversed and other interest rates remain unchanged, each worker will finish these parts one hour in advance. If workers' positions C and D are interchanged, other things unchanged, it will be advanced 1 hour. It is required that if the positions of opposition, propyl and butyl are exchanged at the same time, and other interest rates remain unchanged, these parts should be completed. 10, a rectangular square with a width of 5 cm and a height of 3 cm, made up? Rectangular surface area of
95。 Seven centimeters long? What is the minimum number of cuboids? .
There are only two tickets for the 96 Volkswagen * * * round: individual ticket is 5 yuan each, group ticket is 10, 30 yuan buy 10, and preferential group 10% or more (1). (2) Unit B 208 goes to the park. According to the above regulations on tickets, does the fund meet the minimum amount?
97, A, B, C, Kao, ***260 is called 1/3, and 1/4 B is equal to negative half propylene score 22, so many propylene scores? . . .