Analysis and solution method 1: Assuming that there are X people * * * at the beginning, the total amount of sugar in the two methods remains unchanged, which is 5x+ 10=4× 1.5x-2, and the solution is x= 12, then these sugars * * have12× 5+.
Method 2: After the number of people increases by 1.5 times, each person is divided into 4 pieces, which is equivalent to the original number, and each person is divided into 1.5×4=6 pieces.
With these candies, each person is divided into five pieces, with the extra 10, the less each divided into six pieces and the less two pieces, so the total number of people at the beginning is (10+2)÷(6-5)= 12, so * * has/kloc-.
Two children, A and B, each have a bag of sweets, and each bag of sweets is less than 20. If A gives B a certain amount of sweets, A has twice as many sweets as B. If B gives A the same amount of sugar, A has three times as much sugar as B. So, how many sweets are there in A and B?
According to the meaning of the question, the total amount of sugar should be a multiple of 3 or a multiple of 4, that is, a multiple of 12, because each bag of two bags of sugar does not exceed 20, so the total amount of sugar does not exceed 40. So the total amount of sugar can only be 12, 24 or 36.
If the total amount of sugar is an odd multiple of 12, then the sugar of A is an odd multiple of 12÷(3+ 1)×3=9. Then after giving B the same amount of sugar twice, the sugar of A is 12.
In other words, odd plus even equals even, which is obviously impossible. Therefore, the total amount of sugar cannot be an odd multiple of 12.
Then two children, A and B, can only have even multiples of 12, that is, 24 sweets.
3. There are 42 students in Class A and 48 students in Class B. It is known that in a math exam, the scores are graded according to the percentage system. Results The total math scores of all classes are the same, and the average scores of all classes are integers, and the average scores are higher than 80. How much is the average score of Class A higher than that of Class B?
Solution 1: Because the average score of each class is an integer, the total scores of the two classes are equal, so the total scores are multiples of 42 and 48, so it is a multiple of [42,48] = 336.
Because the average score of Class B is higher than 80, the total score should be higher than 48×80=3840.
Because it is graded according to the percentage system, the average score of Class A will not exceed 100, so the total score should not be higher than 42× 100=4200.
Between 3840 and 4200, only 4032 is a multiple of 336, so the total score of both classes is 4032.
Then the average score of Class A is 4032÷42=96, and that of Class B is 4032÷48=84.
So the average score of Class A is 96-84= 12 higher than that of Class B. 。
Method 2: The average score of Class A is 42 = Class Average × 48, that is, Class A Average × 7 = Class B Average × 8. Because 7 and 8 are reciprocal, the average score of class A is 8 times of a certain number, and the average score of class B is 7 times of a certain number. And because the average scores of the two classes are above 80, they are not higher than 100.
So the average score of Class A is higher than that of Class B 12×(8-7)= 12.
4. A township hydropower station collects electricity charges by households. The specific provisions are: if the monthly electricity consumption does not exceed 24 degrees, it will be charged at 9 cents per degree; If it exceeds 24 degrees, the excess will be charged at 20 points per degree. It is known that family A paid 90.6 points more than family B in a certain month (electricity consumption is calculated by the whole degree). How much did A and B pay respectively?
Analysis and solution If the electricity consumption of both parties exceeds 24 degrees, the difference between their electricity charges should be an integer multiple of 20 cents;
If the electricity consumption of both parties does not exceed 24 degrees, the difference between them should be an integer multiple of 9 cents.
Now 96 points is neither an integer multiple of 20 points nor an integer multiple of 9 points, so the household electricity consumption of A exceeds 24 degrees, and that of B does not exceed 24 degrees.
Assume that household A uses 24+X kWh, household B uses 24-y kWh, 20x+9y=96, x=3 and y = 4.
That is, the electricity consumption of household A is 27 kWh, and that of household B is 20×9= 180 = 1 yuan 8, and that of household A 180+96=276 =2 yuan 7.6.
That is, Party A and Party B each pay 76 cents for electricity in 2 yuan and 65438+80 cents for electricity in 0 yuan.
5. The number of spring outing in primary and secondary schools is an integer multiple of 10. When traveling, the staff of the two schools do not take a car, and each car is as full as possible. It is now known that if both schools rent a coach car with a seat of 14, they need to rent 72 such cars; If both schools rent 19 coaches, the second primary school rents 7 more coaches than the first primary school. How many people will take part in this spring outing?
The analysis and solution assume that the number of spring tourists in the second primary school is m and the number of spring tourists in the first primary school is n, and take19× 6+65438 ≤ m-n ≤19× 8-1,that is, 18, which shows that the second primary school rents seven more vans than the first primary school.
It is also known that two schools need to rent 72 vans with 14 seats, so 70×14+2 ≤ m+n ≤ 72×14, that is, 982 ≤ m+n ≤ 1008.
At the same time, it is known that both m and n are multiples of 10, so there are
The other four groups are because the solutions of m and n are not multiples of 10.
After inspection, only satisfied.
So, 430 people from a primary school and 570 people from a middle school took part in the spring outing.
6. A tourist rowed a boat from the pier of 10 on 15, and he wanted to return to the pier no later than 13. The speed of the river is 1.4 kilometers per hour, and the speed of the ship in still water is 3 kilometers per hour. He rowed for 30 minutes and rested for 15 minutes without changing his direction.
The analytical solution 10 starts from 15 and must be returned no later than 13, so it can be drawn for 2 hours and 45 minutes at most, that is, 165 = 4× 30+3× 15, and four 30 minutes at most.
Downward speed is 3+1.4 = 4.4km/4hr; So the downstream half-hour rowing distance is 4.4×0.5 = 2.2km；;
When the countercurrent velocity is 3- 1.4= 1.6 km /4; Therefore, the upstream half-hour rowing distance is1.6× 0.5 = 0.8km..
After a rest of 15 minutes, the distance of the ship drifting downstream is 1.4×0.25=0.35 km.
In the first case, when starting downstream, it takes at least half an hour to drive 2.2 kilometers, and in the remaining three hours, the inner boat floats downstream by 0.35×3= 1.05 kilometers, so it needs to row 2.2+ 1.05=3.25 kilometers when returning upstream.
3.25÷ 1.6=2.03 125 hours = 12 1.875 minutes. That means at least 30+15× 3+121.875 = 6575. 165 minutes, too late to return on time. Not satisfied.
In the second case, at the beginning of the upstream, the boat will travel 0.8km every half hour, so after three times of upstream, the boat will drift downstream 1.05km when the tourists rest, so it only needs to row 2.4- 1.05 = 1.35km when rowing back. Need 1.35÷4.4≈0.3068 hours ≈ 18.4 1 min. * * * Need 3× 30+3×15+18.41= 65438+. 165 minutes, satisfied.
Therefore, only the second case is satisfied. At this time, the farthest distance is the place where the third countercurrent reaches after two cuts, which is 0.8×3-0.35×2= 1.7 km.
So he can row 1.7 km outside the pier at most.
This machinery factory plans to produce a batch of machine tools. The original plan is to produce 40 units a day, and the task can be completed within the scheduled time. Actually, 48 sets are produced every day, and the task is completed four days ahead of schedule. How many machines are there?
48×[40×4(48-40)]= 960 (Taiwan Province)
8. A printing factory plans to bind a batch of books in 24 days, and bind 12000 copies a day, actually completing the task four days ahead of schedule. How many more books are actually bound every day than originally planned?
12000× 24 ÷ (24-4)-12000 = 2400 (Ben)
9. Of the two brick factories, Factory A originally stored 87,500 bricks, and Factory B stored 4,500 more bricks than Factory A.. One day, A factory sold 25,000 bricks, and B factory sold 3,000 bricks less than A factory. Which factory stores more bricks? How much more?
Brick of Factory A: 87500-25000=62500 (block)
Brick of factory B: (87500+4500)-(25000-3000)=70000 (block)
∴ There are more bricks in Factory B, 70000-62500=7500 (blocks).
10. A basket of apples weighs 45 kilograms. After selling half, the remaining apples weigh 24 kilograms. How many kilograms of apples are there?
(45-24)×2=42 (kg)
1.The distance between a and b is 465 kilometers. It takes * * * 7 hours for a car to travel from A to B at a speed of 60km/h, and then speed up 15km/h to arrive at B. How many hours have you been driving at a speed of 60 km/h?
2. There are several chickens and rabbits in the cage, which are *** 100 feet. If the chicken is replaced by a rabbit and the rabbit is replaced by a chicken, it will have 92 feet. How many rabbits and chickens are there in the cage?
Spiders have eight legs, dragonflies have six legs and two pairs of wings. Cicada has six legs, 1 pair of wings. At present, there are 18 of these three kinds of bugs, with 1 18 legs and 20 pairs of wings. How many bugs are there in each species?
4. In the activity of learning from Lei Feng, students * * * did 240 good deeds, senior students each did 8 good deeds, junior students each did 3 good deeds, with an average of 6 good deeds. How many students are there in this activity?
5. A class of 42 students participated in tree planting, with an average of 3 trees planted by boys and 2 trees planted by girls. As we all know, boys have 56 more trees than girls. How many boys and girls are there?
Answer:
1. solution: suppose it travels at a speed of 60 kilometers per hour for x hours.
60x+(60+ 15)(7-x)=465
60x+525-75x=465
525- 15x=465
15x=60
x=4
A: I drove at 60 kilometers per hour for four hours.
2. Solution: When rabbits are replaced by chickens, each rabbit loses two feet.
( 100-92)/2=4,
There are four rabbits.
(100-4*4)/2=42 pieces.
A: There are 4 rabbits and 42 chickens.
3. Solution: Set 18 Spider, Y Dragonfly and Z Cicada.
Three bugs * * *18, get:
X+y+z = 18 ... one type.
There are 1 18 legs, so:
8x+6y+6z = 1 18 ...
With 20 pairs of wings, you must:
2y+z = 20...c type
Where b -6*a gives:
8x+6y+6z-6(x+y+z)= 1 18-6 * 18
2x= 10
x=5
There are five spiders,
Then 18-5= 13 dragonflies and cicadas.
Then change z to (13-y).
Substitute it into type C, and you get:
2y+ 13-y=20
y=7
There are seven dragonflies.
There are 65438 cicadas +08-5-7 = 6 cicadas.
There are five spiders, seven dragonflies and six cicadas.
4. Solution: The students did 240 good deeds, with an average of 6 good deeds per person.
That means there are 240/6=40 of them.
There are x students in Datong University and (40-x) students in primary school.
8x+3(40-x)=240
8x+ 120-3x=240
5x+ 120=240
5x= 120
x=24
40-x= 16
A: There are 24 students in Datong University and 0/6 students in primary school/KLOC.
5. solution: there are x boys and 42-x girls.
3x-2(42 x)= 56
3x+2x-84=56
5x= 140
x=28
42-x= 14
A: Boys are 28 and girls are 14.
1. Miss Li will buy some stationery from 80 yuan as prizes for the grade sports meeting. He first spent 45.6 yuan to buy eight photo albums, and prepared to use the remaining money to buy several ballpoint pens, each 2.5 yuan. How many ballpoint pens can Miss Li buy?
2. Two identical pumps can irrigate 65,438+0.2 hectares in 3 hours. 1 How many hectares can one pump irrigate per hour?
Xiaoming was 24 years younger than his mother the year before last, and his mother is three times older than Xiaoming this year. How old are Xiaoming and his mother?
4. There is a trapezoidal wheat field with an upper bottom of 200 meters and a lower bottom of 330 meters, with a height of 100 meters. At present, there are harvesters with working width of1.8m and linear speed of 5km/h.. How many hours can you finish harvesting this wheat field?
It used to cost 3.80 yuan to make a plush toy in a toy factory. Later, the production method was improved, and now it only costs 3.60 yuan. How many plush toys can be made at the original price of 180?
6. A highway is 360 meters long, and two construction teams, A and B, simultaneously spread asphalt from both ends of the highway to the middle. The construction speed of Team A is 1.25 times that of Team B, and all roads are paved after 4 days. How many meters of asphalt do Team A and Team B pave every day?
7. Once the laser signal is sent from the earth to the moon, it takes about 2.56 seconds to receive the signal reflected from the moon. As we all know, the speed of light is 300,000 kilometers per second. What is the distance between the moon and the earth at this time?
8. The sum of the sides of a cube is 48 decimeters. What is its surface area and volume?
9. There is a cuboid with a bottom, a height of 24 cm and a side. Find the volume of this cuboid.
10, 20 children in kindergarten class and 30 children in big class share cookies. Children in small classes are given 10, and children in large classes are given 2 more than children in large and small classes. How many biscuits did Qiu Yi share?
1 1. At the Yingying Cultural Festival, the primary school held a singing contest of "Lark in My Heart". The scores given to contestant No.3 by the six judges are: 96.5, 92.5, 87.5, 65,438+000, 83.5 and 77 respectively. According to the scoring rules, the average score after removing a highest score and a lowest score is the player's final score. Please find out the final score of player 3.
12. When the ship leaks water, immediately install two pumps to pump water. At this point, 800 barrels of water have leaked. One pump pumps 18 barrels per minute, and the other pumps 14 barrels per minute, and the water is pumped out in 50 minutes. How many barrels of water leak every minute?
13, parking in the parking lot requires at least 3 yuan. Stop for more than 2 hours, and pay 1. 1 0 yuan for every extra stop 1 hour (if it is less than1hour, it shall be counted as1hour). Xiao Wang paid 7.40 yuan when he left the parking lot. How many hours did he park in this parking lot?
14. How long is a bamboo pole? If the amount of a rope exceeds1.8m, if the rope is folded in half and then measured, it will be1.2m less. How long is this rope?
15. Immerse a cube with a side length of 6 cm into a rectangular tank with a length of 12 cm and a height of 8 cm. When the water level rises by 2 cm, what is the width of the rectangular water tank?
The guard of honor consists of 16 armed forces, with 400 people in each arm and divided into 8 columns. The distance between the front and back of the army team 1 m, the distance between the front and back of the navy team is 2 meters, the distance between the front and back of the air force team is 3 meters, the distance between the teams of various arms is 4 meters, and the three arms walk 80 meters per minute. How many minutes does it take for the honor guards of the three armed forces to pass the 98-meter reviewing platform?
17, a cuboid water tank without a cover was made by the white iron products factory, with a length of 3m, a width of10.5mm and a height of 2m. How many square decimetres of tinplate does it take to make 100 such water tanks?
18, Party A and Party B practice running. If Party A lets Party B run 10 meter first, then Party A can catch up with Party B after running for 5 seconds. If A lets B run for 2 seconds first, then A can catch up with B in 4 seconds. What are the speeds of A and B respectively?
19. There is an isosceles triangle ABC. It is known that AB=AC, the height of BC side is 4.8 cm, the height of AC side is 3.6 cm, and AC=8 cm. Find the perimeter of triangle ABC.
20. The distance between A and B is 6 kilometers. Someone walked from A to B. The first half of the time averaged 80 meters per minute, and the second half averaged 70 meters per minute. How many minutes did it take him to walk the last half of the journey?
Attached answer:
1, about 13 2, 0.2 hectares 3, 12 and 36 years old 4, about 3 hours.
5 190 6 50 and 40 7 38 48 96 and 64
9、864 10、650 1 1、90 12、 16
13、6 14、6 15、9 16、5
17,225018,6 and 419,220,42.5
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And:
1 A workshop can produce 120 class a parts, 100 class b parts or 200 class c parts every day. Class A, Class B and Class C can be selected respectively, and 1 part constitutes a set. Now it is required to produce the most complete set of products within 30 days. How many days does it take to produce three parts, A, B and C?
A math book is 6.25 yuan and a Chinese book is 5.86 yuan. Two books and one * * *, how much is it?
A watermelon weighs 4.86 kg and a cantaloupe weighs 3.5 kg. How many kilograms is a watermelon heavier than a cantaloupe?
A kind of wool costs 48.36 yuan per kilogram. How much is 3 kilos? Buy 0.6 kg?
A professional sericulture group raises 2 1 silkworm, and a * * * produces cocoons 1240 kg. How many kilograms of cocoons are produced per piece on average?
6 Xiaohong has read the story book for 5 days, reading 12 pages every day, and has not finished reading 38 pages. How many pages are there in this book? (Draw a line segment)
7. Three bags of flour and three bags of rice in the canteen. Flour is 25 kg per bag and rice is 50 kg per bag. How many kilograms of flour and rice are shipped?
The militia used 250 bullets for the first time, 320 bullets for the second time, and the third time was less than the sum of the previous two times 180. How many bullets were used for the third time?
9 The school bought 45 boxes of colored chalk, and white chalk bought 15 boxes more than colored chalk. How many boxes of chalk do I buy?
10. An empty basket weighs 2 kilograms, and there are 32 kilograms of peanuts in the basket. How many times the weight of the basket containing peanuts is that of the empty basket?
1 1. The grain store sent two truckloads of flour, each with 80 bags of 25 kilograms. How many kilograms of flour did this grain shop send? (Answer in two ways)
12 and 3 students went to the vegetable garden to collect cabbage, and they were divided into four groups, each group 1 1 person, with an average of 45 kilograms per person. A * * * How many kilograms of cabbage?
13 chemical fertilizer plant plans to produce 7200 tons of chemical fertilizer, which has been produced for four months, with an average of 1200 tons of chemical fertilizer per month, with 800 tons remaining per month. How many months will it take to complete the production?
14. The plastic factory plans to produce 1300 plastic modules and 780 plastic modules in 6 days. According to this calculation, how many days will it take to produce the rest?
15. Li Shifu produced 252 parts in four hours in the morning, and worked at this speed for three hours in the afternoon. How many parts does Li Shifu produce on this day?
16 cement plant plans to produce 3600 tons of cement, which will be completed in 20 days. In fact, it produces 20 tons more than planned every day. How many days does it actually take to complete the task?
17. A pile of 3.6 tons of coal is planned to burn 10 day. After improving the stove, it saves 0.06 tons per day compared with the original plan. How many days can this pile of coal burn now?
18.A and B are 420km apart. A to B plan to take a bus for 7 hours. In fact, its speed is more than planned 10 km. How many hours will it actually arrive?
Xiao Qiang came back to school from home. If he walks 50 meters every minute, 12 minutes to go back to school. If he walks 10 meter per minute, he can go back to school a few minutes earlier.
20. Build a 6.4-kilometer-long expressway, with 1.2 kilometers per month for the first three months and 1.4 kilometers per month for the rest. How many months will it take to complete?
9. Xiaoming spent 10.2 yuan on stationery, bought six pencils at 0.45 yuan each, and bought ballpoint pens for the rest. How many can he buy for each 2.5 yuan?
10. The garment factory originally planned to make 120 suits, each with 4.8m cloth. After improving the cutting method, each set saves 0.3 meters of cloth. How many sets of clothes can be made from the original cloth now?
1 1. A story book, originally 576 words per page, 25 pages. The second edition, with smaller words, only needs 18 pages. How many words are arranged on each page now than before?
12. A passenger train and a freight train leave from Party A and Party B at the same time. The speed of passenger trains is 80 kilometers per hour, and that of freight trains is 60 kilometers per hour. Five hours later, two trains met. How many kilometers is the railway between A and B?
13. Two engineering teams open1500m tunnel at the same time. Construction team A starts from one end and digs 14m every day. Construction team B starts from the other end and digs 16m every day. How many days can the tunnel be dug?
14. Party A and Party B type a 7000-word manuscript at the same time. Party A types 600 words per hour, and Party B types 200 words more than Party A. How many hours does it take to complete the task?
15. After school, Xiao Ming and Xiao Qiang walk in opposite directions at the school gate. Xiaoming walks 70 meters per minute, and Xiao Qiang walks 68 meters per minute. How many meters are they apart after 5 minutes?
16, the distance between a and b is 630 kilometers. Two hours after the bus departs from A, the truck departs from B. It is known that the speed of the bus is 65 kilometers per hour and the speed of the truck is 60 kilometers per hour. A few hours after the van left, it met the bus.
17, the machine tool factory used to know that each machine tool used steel 1.02 tons. After the improved design, each machine tool saves 0. 12 tons compared with the original machine tool. How many machine tools can be made now?
18, Xiaoming bought six pencils and four exercise books at 0.68 yuan each and 0.24 yuan each. Xiao Ming paid 5 yuan money, how much should he get back?
19, A and B trains leave from two places at the same time. The speed of train A is 80 kilometers per hour, and that of train B is 70 kilometers per hour. 12 hours later, the distance between the two trains is still 1 10 km. How many kilometers are there between these two places?
20. Guangming Paper Mill produced a batch of newsprint, which was originally planned to be completed in 28 days, with a daily output of 12.5 tons. The application was completed three days in advance. How many tons is the actual daily output more than originally planned?
2 1, a batch of parts were produced in Li Shifu, and 126 parts were produced three days ago. According to this calculation, it takes 12 days to complete the production task. How many parts are there in this batch?
22. The fertilizer plant planned to produce 84 tons of fertilizer in 30 days, but actually produced 0.2 tons more than planned every day. How many days did it actually finish the task ahead of schedule?
23. A car factory planned to produce16,800 cars throughout the year, and as a result, the annual production task was completed two months ahead of schedule. At this rate, how many cars can be produced throughout the year?
24. A workshop of Xinfeng Agricultural Machinery Factory processes 2480 parts. Originally, 100 pieces were processed every day, and after working for 20 days, 120 pieces were processed every day. So we can finish the task in a few days.
25. A clothing factory used to make a children's dress, using 2.2 meters of cloth at a time. Now the cutting method has been improved, and each set saves 0.2 meters of cloth. The cloth used to make 600 sets of this kind of clothes, how many sets can be made now?
26. Xiaohong bought three exercise books and three new word books, one for 0.36 yuan and the other for 0.32 yuan. How much did Xiaohong spend less on new word books than on exercise books?
27. Students carry water to water trees. Forty-five trees were watered in the third grade, 10 fewer trees were watered in the third grade than in the fourth grade, and half fewer trees were watered in the fourth grade than in the fifth grade. How many more trees are watered in the fifth grade than in the third grade?
A car traveled 280 kilometers from A to B, 500 kilometers away. Find the ratio of the distance traveled to the remaining distance.
Team A/KLOC completed a project in 0/0 day and team B completed it in 8 days. What is the work efficiency ratio between team A and team B?
There are 40 students in Class 5 (1), and 32 students have reached the standard of physical exercise. What percentage of the students in this class fail to meet the standard (that is, fail rate)?
3 1, Xiao Li, Xiao Zhao and Xiao Wang jointly produced a batch of parts. After completion, Xiao Li counts the total, Xiao Zhao counts the total, and Xiao Wang counts the total. Find the ratio of the number of parts made by three people.
Class 32' 5 took the first math exam (1), 48 students passed and 2 failed. Seek the passing rate of this math exam.
33. One day, there were 38 employees in a workshop, and two were absent, so they asked for attendance.
34. A factory completed 56% of the planned output in the first half and 64% in the second half. What percentage has it increased this month?
The unit price of a set of self-study books is 160 yuan, which is lower than the original price. 40 yuan, what's the current price?
36 Young Pioneers Greening Group planted 360 trees in spring and 440 trees in autumn, and 760 trees survived, so as to seek the survival rate of saplings.
The moon cake factory produced moon cakes 140 tons last year and 2 10 tons this year. Compared with last year, what is the growth rate this year?
What percentage is 6 kg more than 5 kg? How much is 5 kg less than 6 kg?
A factory completed 56% of the planned output in the first half and 64% in the second half. What percentage has it increased this month?
The planned number of garments produced by garment factories in the second half of the year is 20% higher than that in the first half of the year, so what proportion of the planned number of garments produced in the second half of the year?
4 1. The oil yield of rapeseed is 38%. How many tons of oil can 5 tons of rapeseed process?
42. It is planned to invest 5 million yuan to build a waterworks, which is actually 5% less than planned. How many million yuan was saved?
43. The oil yield of rapeseed reached 85%. Qinfen Village planted 8 hectares of rapeseed, and harvested 3,750 kilograms of rapeseed per hectare. * * * How many Jin of rapeseed can you produce?
44. There are 200 sixth-grade students in Xinzhuang Primary School, of whom 120 participates in interest groups. How many people do you need to participate in the interest class to reach 88%?
There are 654.38 million broilers in the chicken farm, which are sold for the first time and 25% for the second time. How many thousands are left?
46. A pile of coal weighs 120 tons. Remove 20% of the total weight on the first day and 25% of the total weight on the second day. How many tons are left?
47. A car used to use 12 liters of gasoline per hour, but it saved 10% after being repaired. How many liters of gasoline does this car use per hour now?
48. The fourth grade students in a primary school 120, and the fifth grade is less than the fourth grade 10%. How many students are there in Grade Five?
49. Cars travel 24 kilometers per hour, and motorcycles are 70% faster than cars. How many kilometers does the motorcycle travel per hour?
50 An expressway was built in the first month, 6 kilometers in the second month, and 37.5% was not repaired. What is the total length of this highway?
5 1 A factory produces a batch of parts. The first day, it produced 40 pieces. The second day produced more 10% than the first day, and the two-day output accounted for 25% of the total. How many pieces are there in this batch?
Car A traveled 72 kilometers from City A to City B, with 62.5% left in the whole journey. How many kilometers does this bus travel to B city?
53. Two cars, A and B, leave from two places at the same time. When the first car travels 60% of the whole journey and the second car travels 75% of the whole journey, the distance between the two cars is 140 km. How many kilometers are the two places apart? How many kilometers does car A travel less than car B?
54 Qingfeng Store delivers 1620 Jin of oranges and pears, and the pears delivered are 80% of oranges. How many kilograms of oranges and pears were delivered? .
The oil yield of rapeseed is 38%. How many tons of oil can 5 tons of rapeseed process?
It is planned to invest 5 million yuan to build a waterworks, which is actually 5% less than planned. How much did you save?
195, the national industrial and commercial tax revenue was 538.3 billion yuan,196 increased 1.05 1 100 million yuan. Compared with 1995, what is the growth percentage of 1996?
58. Xinhua Bookstore transported 5,250 books of literature, art and science to the countryside, including 25 books of literature and art and 80 books of science and technology, each with the same number of books. How many books are there in each package? How many books are there in science and technology and literature and art respectively?
59. A grain store sells 50 bags of flour in the morning and 30 bags of flour in the afternoon. The weight of each bag of flour is equal, and it sells more 1600 kg of flour in the morning than in the afternoon. How many kilograms does each bag of flour weigh? How many kilograms of flour do you sell in the morning and afternoon?
60. The first truck delivered 80 packages of cement, and the second truck delivered 65 packages of cement, which was 1.5 tons less than the first truck. How many tons of cement were transported by two trucks?
6 1. A fruit shop has two baskets of apples with the same unit price. The first basket weighs 45 kg, the second basket weighs 39 kg, and the second basket sells less than the first basket 15 yuan. How much is each basket worth? How much are two baskets of apples worth?
62. In Huafeng Fruit Company, 840 kilograms more pears were shipped than oranges, and the weight of pears was 1.5 times that of oranges. What are the weights of oranges and pears?
63. The garment factory has 156 workers, among whom the number of female workers is three times that of male workers. How many male and female workers are there?
64. The weight of two packages of relief goods is 154kg, of which the first package is twice as small as the second package, and each package weighs 14kg.
65. The warehouse stores rice and flour. It is known that the stored flour is 4500 kilograms more than rice, and the stored flour is three times more than rice, 700 kilograms. How many kilograms of rice and flour are stored in the warehouse?
66. Mingming went to buy clothes on Sunday and spent 175 yuan to buy a suit. It is known that coats are more expensive than trousers 15 yuan. How much are the coat and trousers?
The circumference of a rectangle is 55 cm, and the known length is 3.5 cm longer than the width. What is the length and width of this rectangle?
68. The circumference of a triangle is 16.4cm, in which the first side and the second side are both 5cm. How long is the third side?
69. Xiao Zhang, Xiao Li and Xiao Wang weigh themselves. Together, Xiao Zhang and Xiao Li weigh 90.8 kg, while Xiao Wang and Xiao Li weigh 88.5 kg. How many kilograms is Xiao Zhang heavier than Xiao Wang?
70. The Zhang family planted three responsibility fields. The first one is 1080 m2, which is more than the second one 15.7 m2, and the third one is 8.5 m2 less than the first one. Please ask at least two questions and answer them according to what you know.
7 1, Dad is 0.52 meters taller than Xiaohong, 0.2 1 meter taller than Mom, and how many meters taller than Xiaohong?
72. The supermarket has an infrared remote control tank toy, the price is 130.00 yuan, which is cheaper after the discount 13.00 yuan. Xiao Ming is going to buy this toy tank with the money from buying two mini cars each in 55 yuan. Does he have enough money? If not, how much money is left?
73. This year, the cement plant allocated 3.324 million yuan for pollution control, 2.347 million yuan for sewage tank renovation, and another 855,000 yuan. How many million yuan does the factory have for pollution control now?
74.b is between A and C. Car A is 48.5 kilometers away from B. How many kilometers is it from C at this time?
75. The original price of a children's suit in Asia is 125.90 yuan, and the promotion price for celebrating June 1st is 98.80 yuan. How much cheaper?
76. Xiao Wang weighs 36.5 kg, Xiao Li weighs 4 1.4 kg, and a sumo wrestlers weighs 125.8 kg. How many kilograms does this athlete weigh more than Xiao Wang and Xiao Li combined?
77. Xiao Qiang is 0. 19 meters higher than Xiao Fang, Xiao Fang is 22 centimeters shorter than Tiger, and Tiger is several meters higher than Xiao Qiang.
78. Someone bought an item and paid it to 50 yuan, the shop assistant. The clerk misread the decimal point of the commodity price and gave him 46.75 yuan. He said he found too much. What is the price of this project?
79. The fruit shop brought three baskets of apples, each weighing 30.5 kilograms. How many kilograms did a * * * bring? If the price per kilogram of apples is 2.6 yuan, how much can these apples earn?
80. Average daily electricity consumption of schools 17.3 kWh. How many kWh will be used in May? If you use 0.5 yuan for every kilowatt hour, how much will you have to pay this month?