2. When calculating a-34.6+7.2, a classmate miscalculated a-34.6+72. What is the change between the calculated result and the correct result?
3. In the high jump, Zhang Ying jumped 1. 1 m, Hong Xiao was 0.05m lower than Zhang Ying and Li Qiang was 0.25m higher than Xiao Hong. How many meters did Li Qiang jump?
View from a height or a distance
The school bought a batch of football, basketball and volleyball. It costs 649.6 yuan to buy football, which is 227.6 yuan more than basketball and 39.2 yuan less than the sum of basketball and volleyball. How much did it cost to buy volleyball?
Create a new Microsoft Word document. document
The grocery store shipped 350 bottles of fresh milk, and the number of yogurt bottles was twice that of fresh milk bottles. How many bottles of yogurt did the grocery store send?
6. To build a canal, it was originally planned to build 0.84 km per day, but actually it was built 0. 16 km more than originally planned. 12 days later, it is 0.4 km short of repair. How long is this canal?
7. I bought 3 kilograms of bananas and 2 kilograms of apples. 1kg apple price 2 yuan, 1kg banana is more expensive than apple 1 yuan. How much is a * * *?
8. Students from Grade 4 and Grade 5 of Jianguo Road Primary School visited the Science and Technology Exhibition. 346 people lined up in two rows, with the distance between two adjacent people 1 m, and the team walked 59 meters per minute. Now we need to cross an 889-meter-long bridge. * * * How many minutes does it take to get off the bridge from the tail row?
9. An object fell from the sky and landed four seconds later. It is known that the falling distance in the first second is 6 meters, and the falling distance per second is more than that in the previous second 1 1 meter. How many meters is this object from the ground before it falls?
10, a new shed was built in Yushan Farm, with an indoor cultivated area of 285 square meters. All tomatoes were planted, with an average yield per square meter 12 kg. Calculated by 2 yuan per kilogram, how much can a * * * earn?
1 1, pine trees and Berlin can secrete fungicides and purify the air. If 1 ha pine forest secretes 54 kilograms of bactericide every day, how many kilograms of bactericide does 25 hectares pine forest secrete 3 1 day?
12, a sika deer 1.5m high, giraffe is three times as tall as sika deer. How many meters is sika deer shorter than giraffe?
13. Students in the biology group keep rabbits and pigeons. It takes/kloc-0 yuan to raise a rabbit and 0.5 yuan to raise a pigeon. The group has funds for activities in 30 yuan every month. How many pigeons can they keep? How many rabbits?
14, an ostrich runs 40 kilometers per hour, a rabbit runs twice as far as an ostrich, a gazelle runs 8 kilometers more than a rabbit, and how many kilometers does a gazelle run per hour?
15, laser ranging is accurate and fast. It takes about 2.56 seconds to send a laser signal from the earth to the moon and receive the signal reflected from the moon. It is known that the speed of light is 300,000 kilometers per second. What is the approximate distance between the moon and the earth at this time?
16, 34 students from Class 3, Grade 4 took a group photo. Pricing 25 yuan, giving away 4 photos. In addition, each piece is printed in 2 yuan. Everyone in the class wants one. How much is one?
17. The hens in mechanized chicken farms lay an average of 304 eggs every year. If calculated according to the weight of each 16 eggs 1 kg, how many kilograms of eggs are laid by each chicken every year?
18. An elephant weighs 5 tons, which is 15 times the weight of a yellow cow. How many tons is this elephant heavier than this bull?
19, 5 cars can save 35 kilograms of gasoline in 7 days. How many kilograms of gasoline can each car save on average every day?
20. The daily output of No.1 well in a coal mine is 960 tons, which is twice that of No.2 well. The daily output of Well No.3 is more than that of Well No.2 135 tons. How many tons of coal do these three wells produce on average every day?
2 1, Xiaohong's father bought her books with 3 yuan's money and 3 yuan's money bought six exercise books. When buying books, she found that there was not enough money to buy books, so she had to take out some money to buy exercise books. In this way, she only bought four exercise books. How much did you spend on books this time?
22. If it takes 9 minutes to saw a piece of wood into 3 pieces, how many minutes will it take to saw this piece of wood into 4 pieces at the same speed?
23. Eight cars 14 days saves 336 kilograms of gasoline. How many kilograms of gasoline can each car save a day?
24.( 1) twice a number is 48, (2) the product of two factors is 83 19,
What's this number? One factor is 47. What is the other factor?
25. In the canteen, Uncle Zhang bought 45 Jin of beans at the food market, gave them to the salesman at the price of 100 yuan, and got back 19 yuan. How much is it per kilogram of beans?
26. A ship travels12km per hour and reaches its destination in 42 hours. If you drive at the speed of18km per hour, how many hours will it take to reach your destination?
27. Fill in the appropriate figures in the brackets.
0.5 hours = () minutes 1.5 hours = () hours () minutes.
() hours =30 minutes () hours =2: 45.
28. A garment factory planned to make 660 sets of clothes, which took five days, with an average of 75 sets per day. The rest will take three days to finish. How many sets do you have to make every day on average?
29. Xiaoming and his father go to the video game playground by plane. When buying a ticket, Xiao Ming paid 20 yuan and took back 8 yuan. The ticket price of students on the playground is half that of adults. How much are the tickets for students and adults?
30. You have to pay 5 yuan at least for parking in the parking lot. If the parking time exceeds 1 hour, 2 yuan will be paid more for each time it exceeds 1 hour. When a car leaves the parking lot, it is handed over to 9 yuan. How many hours did it stop?
3 1, there are five Mondays in a month, but the first and last days of this month are not Mondays. Do you know what day it is on the first day of this month? How many days are there in this month?
32. When approximating some application problems, we should consider the actual situation. How appropriate should the answers to the following two questions be?
(1) How many sets of children's clothes can be made from 2.2m and 50m fabrics per set of children's clothes?
(2) Each oil drum can hold up to 4.5 kilograms of oil. How many such oil drums do you need to hold 60 kilograms of oil?
33. Bees fly 10 km in 0.5 hour, which is twice as fast as butterflies. How many kilometers does this butterfly fly per hour?
34. Harvesting soybeans with a harvester can harvest 20 hectares in 5 days. According to this calculation, how many hectares can be harvested in 7 days? How many days does it take to harvest 60 hectares of soybeans?
35. With the same two pumps, you can irrigate 12 hectares in 3 hours. According to this calculation:
(1) 1 How many hectares of land can the water pump irrigate in 1 hour?
(2) 1 How many hectares of land can a water pump irrigate in 4 hours?
(3) How many hectares of land can four pumps 1 hour irrigate?
(4) How many hours does it take to irrigate 1 00 hectare with1pump?
Xiaolong bought 1 kg candy and 3 kg biscuits, and paid 44 yuan money. Xiaoli bought the same candy and cookies, 1kg, and paid 24 yuan money. How much are these sweets and biscuits per kilogram?
37. A textile mill produces an average of 938 kilograms of cotton yarn per hour. If each kilogram of cotton yarn weaves 7 meters, how many meters of cotton yarn can this factory produce per hour?
38. A mechanized farming team of Qianjin Farm has 24 production personnel and cultivates 288 hectares of land. Last year, the average grain harvest was 6 tons per hectare. How many tons of grain were produced per capita last year?
39. Xiaohua divided 3.6 by a number, and got 24 because the decimal point of the quotient was wrong to the right. What is the divisor of this question?
40. (1) What is the product of the sum of 4.8 and 2.2 multiplied by 4?
(2) What is the product of 20.2 minus 2.2 divided by 3 and 2?
4 1, Xinxing Coal Mine produced 43,500 tons of coal in July, 50,000 tons in August and 56,500 tons in September. How many tens of thousands of tons of coal are produced on average every month?
42. There are two kinds of tickets for a concert: 40 yuan and 60 yuan. 60 yuan has 100 seats and 40 yuan has 250 seats. Box office income 15000 yuan. How many people are in the audience? It is known that both kinds of tickets are sold in whole tens. )
43. Xiaogang18m fence is enclosed with a fence to form a rectangular chicken coop with a width of 4m. What is its area?
44. What's the difference between (1) 36 divided by 4 and subtracting the product of 2 and 4?
(2) What is the product of the sum of13.7 and 22.3 divided by 12 and multiplied by 9?
45. An engineering team paved a section of road, working four hours in the morning and three hours in the afternoon every day. This construction team paves a road every day. If calculated at 48 meters per hour, how many meters is it?
46. Xiaohong bought three exercise books, one 0.5 yuan, three new word books and one 0.3 yuan. How much did Xiao Hongyi spend?
47.( 1)6.2 minus the sum of 2.4 and 1.3. What is the difference?
(2) What is the product of 6.2 minus 2.2 multiplied by 2?
(3) What is the quotient of 9.2 plus the difference between 8.4 and 1.6 and the sum divided by 4?
(4) Divide 24 by 10 minus 6. What is the quotient?
48. In the fourth grade, I want to buy five photo albums, five mechanical pencil and three outstanding students. 30 yuan used it to buy photo albums, mechanical pencil 10 yuan. How much is the photo album more expensive than mechanical pencil?
49. The sports team of Dongguan Primary School has 7 1 person, including basketball players 15. The number of track and field athletes is 2 1 more than that of basketball players, and the rest are football players. How many people are there in the football team?
50. There are early rice fields in the rice specialty group. The area is 450 square meters, and the average rice yield per square meter is 1 kg. What is the yield of this early rice field?
5 1. Pioneer Primary School should use red paper with a length of 1 m and a width of 0.5 m to arrange the honor roll. This honor roll is 2 m high and 1 m long. How many sheets of this paper do you need to arrange this honor list?
52. 500 trees should be watered in the fourth and fifth grades. In the fourth grade, water 50 trees every day for 4 days. The rest was watered by the fifth grade for five days. How many trees are watered every day in the fifth grade?
53. Li spent 1 yuan on stationery and bought four pencils at 1 yuan each. The rest of the money was used to buy photo paper. How many photo papers did you buy for each 0.5 yuan?
54. Xinfeng Farm Tool Factory has produced 540 farm tools. Before 10, 32 pieces were made every day on average, and the rest were completed in 5 days. How many pieces will be made on average every day?
Xiaoling read a 290-page novel, and read 20 pages every day for the first four days. How many days can you finish reading 30 pages a day?
56. A bookbinding team has to bind 2,640 books, and 240 books have been bound in three hours. According to this calculation, how many hours will the remaining books be bound?
Three boxes, one containing two red balls, one containing two white balls and one containing one red ball and one white ball. Now the labels on the three boxes are all wrong. Can you take a ball out of one box and determine what color the balls in these three boxes are?
58. The school canteen delivers coal 1 ton, and it is planned to burn for 40 days. Due to the improvement of the stove, 5 kilograms are saved every day. How many days can this batch of coal burn?
59. Hongxing Primary School plans to collect 120kg tree species in 20 days. In fact, 2 kilograms were collected every day than originally planned. How many days did it actually take to collect these trees?
60. I bought 280 Jin of rice in the canteen and planned to eat it for 7 days. In fact, I eat 5 kilograms less than planned every day. How many days did this batch of rice actually eat?
6 1, a production team processes a batch of auto parts. It was originally planned to process 200 pieces a day, and complete the task in 15 days. Actually, 250 pieces are processed every day. So finish the task a few days in advance.
62. A PLA unit conducts camping training. It was originally planned to March 35 kilometers every day and complete the journey in 15 days. Actually completed ahead of schedule 1 day, how many kilometers do you walk on average every day?
63. The washing machine factory planned to produce 16800 washing machines throughout the year, and as a result, the annual production task was completed two months ahead of schedule. At this rate, how many washing machines can be produced throughout the year?
64. A workshop of Xinfeng Agricultural Machinery Factory processes 2,480 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.
65, a story book, the original 576 words per page, 25 pages. The second edition is smaller, with more words per page than the original 124. How many pages should I arrange? (Numbers are reserved as integers)
66. Xinfeng Garment Factory cuts suits with a batch of cloth. According to the original cutting method, it can be cut into 140 sets, with an average of 3 meters per cloth. Actually cut 10 sets, ()?
Add questions, compile three-step application questions, and then answer them. )
67. A pulverizer used to process 1.5 tons of feed every day, but now it processes 0.5 tons more than before. How many days does it take for these two crushers to process 19 tons of feed?
68. Xiaohong's height is1.36m, and Xiao Qiang is 0.04m taller than Xiaohong. The sum of their heights is twice that of Xiao Lin. How tall is Xiao Lin?
69. The department store delivered 300 pairs of sports shoes, which were packed in 2 wooden cases and 6 cartons respectively. If there are as many sneakers in two cartons as 1 wooden box, think about it: how many pairs of sneakers are there in each wooden box and each carton?
70. The power plant originally used 45 tons of coal to generate 654.38 million kWh of electricity. After improving the equipment, 5 tons of coal was used less, and more than 654.38 million kWh of electricity was generated. How many million kilowatt-hours of electricity can coal originally used to generate 5.6 million kilowatt-hours of electricity generate?
7 1. A chemical fertilizer factory originally planned to complete a task on 2 1 day, but it completed the task in 9 days because it produced 7 tons of chemical fertilizer every day. How many tons of chemical fertilizer was originally planned to be produced every day?
Xiao Qiang and Xiao Li walk from home to school at the same time. Xiao Qiang walks 65 meters per minute, and Xiao Li walks 70 meters per minute. Four minutes later, the two met at the school gate. How many meters are they apart?
73. The distance between the two places is 270 meters. Xiaodong and Xiaoying started from two places at the same time and came relatively. Xiaodong walks 50 meters per minute and Xiaoying walks 40 meters per minute. How many minutes did they meet?
74. Two cars are leaving from one place at the same time in opposite directions. Car A travels 44 kilometers per hour on average, and car B travels 38 kilometers per hour on average. After 3 hours, how many kilometers are the two cars apart?
75. The two trains A and B are running in opposite directions. Car A travels 75 kilometers per hour. The b train runs at 69 kilometers per hour. 1 hour later, car a left, car b left, and two hours later, the two cars met. How many kilometers is the railway between these two places?
76. The two engineering teams jointly opened a 675-meter-long tunnel and cut in at one end at the same time. The first team drives12m every day, and the second team drives13m every day. How many days does it take to cross this tunnel? How many meters were dug when the two teams got through?
77. The railway from Changsha to Guangzhou is 699 kilometers long. A freight train runs from Changsha to Guangzhou at a speed of 69 kilometers per hour. 1 After the train leaves, a bus travels from Guangzhou to Changsha at a speed of 7 1 km. Two cars will meet in a few hours.
78. A workshop uses two machine tools to process 2 160 parts at the same time. The first machine tool processes 24 pieces per hour, and the second machine tool processes 30 pieces per hour. If you work 8 hours a day, how many days will it take to finish processing these parts?
79. Feng Li's home is in the east of the school, and Zhao Hong's home is in the west of the school. They both left school and went home at the same time. Li Feng travels 80 meters per minute, and Zhao Hong travels 70 meters per minute. Four minutes later, the two arrived home at the same time. How many meters are they apart?
80. A garment factory used to make a children's garment, and every time it was covered with a cloth of 2.2 meters. 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?
8 1, a typist needs to type a manuscript of 2 1000 words, and the planned time is 12 hours. Due to the improvement of typing speed, I typed 250 more words per hour. How many hours did it actually take to finish typing this manuscript?
82. A county held a long-distance race, and the athletes ran 3 kilometers away from the starting point and returned to the starting point. The leading athlete runs 3 10 meters per minute, and the last athlete runs 290 meters per minute. Two athletes met a few minutes after the start of the game. How many meters before the return point when we meet?
83. A car and a tractor leave from City A to City B at the same time. Cars travel 49 kilometers per hour and tractors travel 35 kilometers per hour. Six hours after the departure, the bus will arrive in B city first. How many hours does it take for the tractor to reach B city?
84. A bridge is 2400 meters long. A train crosses the bridge at a speed of 900 meters per minute, and it takes 3 minutes to leave the bridge from the front to the rear. How long is this train?
85. Answer the following questions and talk about the similarities and differences of the three questions.
(1) The toy factory plans to produce 1200 monkeys, which will be completed in 15 days. How many monkeys will be produced on average every day?
(2) The toy factory plans to produce 1200 monkeys, and 400 monkeys have been produced. The rest will take 10 days to complete. How much is the average daily production?
(3) The toy factory plans to produce 1200 monkeys, and has produced 80 monkeys a day for five days. The rest will take 10 days to complete. How much is the average daily production?
86. A hotel has 25 double rooms and 45 triple rooms. How many people can stay in this hotel?
87. Party A and Party B start from two opposite places at the same time. Party A walks 60 meters per minute, Party B walks 80 meters per minute, and meet each other in 40 minutes. How far are the two places apart?
88. The store shipped 16 baskets of apples, each weighing 43kg. Pears delivered are less than apples 120kg. How many kilograms of pears?
89. The truck travels 45 kilometers per hour, and the speed of the car is 1.4 times that of the truck. At the same time, they started from two places with a distance of 162 km and drove in opposite directions.
A few hours later, two cars met?
How many kilometers did the two cars travel when they met?
(3) If it is 8: 00, 15, when will we meet?
90. Two cars started from a factory at the same time and drove in opposite directions. One car travels 33 kilometers per hour, and the other car travels 42 kilometers per hour. How many minutes later, the distance between two cars15km?
9 1. The grain processing plant uses two mills to grind 17280 kg at the same time. The first grinder grinds 364 kilograms per hour, and the second grinder grinds 356 kilograms per hour. If you work 8 hours a day, how many days will it take to finish grinding the flour?
92. Some people put bats in a room with mosquitoes to do experiments. The original weight of bats is 3.9 grams. /kloc-after 0/5 minutes, it increased to 4.29 grams due to eating mosquitoes. The average weight of mosquitoes is 0.002 grams. How many mosquitoes do bats eat a minute?
93. A forest farm used a sprayer to spray chemicals on trees, and two sprayers sprayed 200 trees in four hours. According to this calculation, how many plants can five sprayers spray in six hours?
94. The distance between Party A and Party B is 480 kilometers. A car goes from A to B at a speed of 52 kilometers per hour. After driving for 3 12 kilometers, it meets a car coming from B. If B's car is driving at a speed of 42 kilometers per hour, do you think the two cars left at the same time?
95. A student's home is 3 kilometers away from school. He goes to school by bike every morning at a speed of15km, and arrives at school on time. One morning, due to the headwind, he could only ride at the speed of 10 km/h at the starting point of 10 km/h. At what speed should he get to school on time for the rest of the journey?
96. A factory used to use 468 tons of water every month. After carrying out water-saving activities, the original annual water consumption can now be increased by one month, and how many tons of water can be saved on average every month?
97. Dongzhaozhuang opened barren hills for afforestation last year. Planting 6 hectares of apple trees, each hectare 1050; Plant 4 hectares of peach trees with 3000 trees per hectare. How many fruit trees does a * * plant?
98. Xiaorong keeps 45 chickens and 18 ducks. If each chicken can lay 13kg a year and each duck can lay 12kg a year, how many Jin of eggs can these chickens and ducks lay a year?
99. The road from Tamura to the county seat is 2 1 km long. It takes 3 hours for a person to ride from Tamura to the county seat, and 0.5 hours for a car to drive from Tamura to the county seat. On average, how many kilometers do cars travel per hour more than cyclists?
100, 244 books will be repaired for the library in the fourth grade. Repair 49 copies on the first day, 5 1 copy on the second day, and finish the rest three days. How many books will you repair on average every day?
10 1. The construction site needs 50 tons of yellow sand. It was transported five times by a car with a load of 4 tons, and the rest was transported by a car with a load of 2.5 tons. How many times will it be shipped?
102, 0.92 yuan per kilogram of flour and 0.80 yuan per kilogram of rice. Buy/kloc-0.5 kg of flour and rice, pay 30 yuan, how much should I get back? (Answer in two ways)
103, a car and a motorcycle leave from two places 165 km away at the same time, leaving relatively. Cars travel 50 kilometers per hour, and the speed of motorcycles is 1.2 times that of cars. How long does it take for two cars to meet?
104, Miss Wang has to walk 6 kilometers from school to the county seat. I was going to ride a bike, and it will take me 20 minutes. Later, it was changed to walking, which was 200 meters less per minute than riding a bike. How long will it take to walk to the county seat?
105, a road construction team originally planned to complete an expressway in 20 days. Actually, 45 meters more than originally planned is repaired every day, and the task is completed five days ahead of schedule. How many meters of roads are planned to be built every day?
106, a worker processes a batch of parts, and it is planned to process 20 parts per hour. 12 hours can be completed. (Answer in different ways)
(1), now finished 2 hours ahead of schedule, how many more parts are processed per hour on average?
(2) If 4 pieces are processed per hour, how many hours can it be completed in advance?
(3) In the first four hours, 24 pieces were processed per hour on average. According to this calculation, how many hours will the rest be processed?
1. People ride bicycles 1 hour,16km. How many kilometers can they walk in three hours?
2. The express train 1 hour travels about 160 km. How many kilometers can you drive in 3 hours?
3. There are about 40 varieties of lilies, and azaleas are about 17 times that of lilies. How many kinds of azaleas are there?
4. KFC set meal 18 yuan, 2 1 Yuan and 60 yuan. How many ways can I buy it?
5. A calculator 24 yuan, Miss Li wants to buy four. He brought 100 yuan. Is it enough?
6. Every tree seedling 16 yuan, buy 3 trees and get 1 tree. How much cheaper is it to buy three at a time?
7. It took Uncle Li 12 hours to get to Beijing by train from a certain city, and the train 1 hour traveled 145 kilometers. How many kilometers is it from this city to Beijing?
8. It takes 1 14 minutes for the first man-made earth satellite launched by China to orbit the earth once, and how many minutes does it take to orbit the earth 59 times? Is it longer than 5 days or shorter than 5 days?
9. A forest park has 124 hectares of forest and 1 hectare of forest, which can retain about 32 tons of dust a year and suck out about 85 tons of water from the ground one day.
(1) How many tons of dust can the forest in this park trap every year?
(2) How many tons of water can the forest in this park absorb from the ground in a day?
10. The school is going to issue exercise books to class 15, each class 144 copies, and 40 copies need to be reserved. How many exercise books should schools buy?
1 1. The school should add two new books to the library: Children's Encyclopedia each 125 yuan and Mathematical Conjecture each 18 yuan, each with three sets. How much does it cost to make a * * *?
12. Express speed160km. How many kilometers is 30 hours feasible?
13. The speed of a car is 80km/h, how many kilometers is it feasible in 2 hours?
14. Li 2 Li's riding speed is 225m/min. 10 min How many meters is feasible?
15. The Shenzhou IV spacecraft launched by China takes about 90 minutes to orbit the earth once, and one * * * orbits the earth 108 times. How long did it take?
16. An elephant in the park eats 350 kilograms of food a day. The breeder has prepared 5 tons of food, enough for the elephant to eat for 20 days?
17. Xiao Qiang runs every morning 15 minutes. His speed is about120m/min. How many meters does Xiao Qiang run every day?
18. Uncle Wang set out from the county seat to send fertilizer to Wangzhuang Township. It took him three hours to go there and two hours to come back. The speed of going there is 40 kilometers per hour.
(1 How far is it from the county seat to Wangzhuang Township?
(2) How many kilometers per hour did you drive on average when you returned?
1. A tourist bus traveled in the plains and mountains for 2 hours and finally reached the top of the mountain. The speed of the flat land is 50 km/h and the speed of the mountain area is 30 km/h. How long is this journey?
2. Grade four students go for an autumn outing. Each set of tickets and tickets to 49 yuan need 104 sets. How much should they prepare to buy tickets?
There are 80 balloons, 20 in each class. We can divide them into several classes.
4. bunting 120, 30 in each shift. Can you divide them into several classes?
5.92 comic books, 30 in each class. How many classes can you divide? How many copies are left?
6. 140 storybook, 30 books per class, how many classes can it be divided into? How many copies are left?
7.2 1 Selected Composition 84 yuan. How much is each selected composition?
8. Miss Wang has 196 yuan. He wants to buy a dictionary from 39 yuan. How many can he buy? How much is left?
9. The school auditorium has 26 seats in each row, and there are 40 students in grade four/kloc-0. How many lines can you fill in? How many people are left?
10.* * There are 576 students, and every 18 students form an environmental protection team. How many groups can you form?
1 1. 10 is the school environmental protection month. * * * 930 waste batteries were collected, and how many waste batteries were collected every day on average.
12. Xiaolin's orchard harvested 3 10 Jin of pears this year, and the number of apples harvested was 19 times that of pears. How many kilograms of apples were collected?
13. A bus travels for 3 hours 174 km. At this speed, how many kilometers is 12 hour feasible?
14. A titmouse can eat about 800 pests in 5 days. According to this calculation, how many pests can a titmouse eat in a month? A month is 30 days. )
15. Column calculation:
What is 40 times (1)25?
(2) How many 18 are there in 756?
(3) Divide 300 into 20 parts on average. How much is each part?
(4) How many times is 884?
(5) What is the difference between the product of 38 and 64 and the quotient of 162 and 18?
(6) What is the difference between 876 and 158 multiplied by 32?
(7) What is the sum of 965 plus 3276 divided by 84?
1. A rectangle is 400 meters long and 150 meters wide. A * * * receives 48 tons of grain. How many tons of grain are collected per hectare on average?
2, a square land with a side length of 300 meters, if the grain harvest per hectare is 10 tons, how many tons will a * * * harvest?
3. The length of the classroom is10m and the width is 8m. If you want to lay a square brick with an area of 80 square decimeters in the classroom, how many square bricks do you need?
4. The area of the stadium is15000m2. If you want to lay a square rubber sheet with a side length of 2 meters, how many such rubber sheets do you need?
The playground is 25m long and 40m wide. If you want to spread a tile with an area of 2 square meters on the playground, how many tiles does a * * * need? A rectangle with a length of 400 decimeters and a width of 300 decimeters, if you collect 4 kilograms of beans per square decimeter, how many kilograms will a * * * collect?
1, a square with a side length of 500 meters, grain harvest 100 tons, how many tons of grain per hectare on average?
2. How many wear-resistant bricks should be used to pave a rectangular conference room floor with a length of 12m and a width of 6m?
3. The rectangle has an area of 60m2 and a length of10m. What's its circumference?
10. This plane can fly 2000 kilometers in 5 hours. How many kilometers can you fly in seven hours at this speed?
1 1. An electrical workshop needs to assemble radio recorders, and 240 sets can be assembled every day, which can be completed in 10 day. If 300 sets are assembled every day, how many days can it be completed?
12. The school bought 8 boxes of stationery, each box is 10 box, and each box contains 50 pencils. How many pencils did a * * * buy?
13. The battery factory produced 7200 batteries. Every 12 battery is packed in a box, and 6 batteries are packed in a box. How many boxes can a * * * hold?