How difficult is the application problem in the fourth grade of primary school? The following are the answers to the application questions in the fourth grade of primary school. Welcome to read!

1. A certain unit of the People's Liberation Army has to March 502 kilometers every day and start hiking for 60 kilometers. After walking for 3 days, the remaining distance is 20.5 kilometers per day. How many days will it take to finish it?

The rice in bag a weighs 68kg. After pouring 15kg from bag A into bag B, bag A is 5kg heavier than bag B ... How many kilograms of raw rice is there in bag B?

A steel mill produces 830 tons of steel every day for the first 3 days and 850 tons every day for the next 5 days. How many tons of steel is produced on average every day?

The motorcyclist traveled 60 kilometers at the speed of 20 kilometers per hour, and came back 30 kilometers per hour. What is the average speed of going back and forth?

5. Workers in the first workshop of a machine tool factory use 18 lathe to produce 720 machine parts in two hours. How many machine parts do 20 such lathes produce in three hours?

6. You can make120kg tofu with 30kg soybeans. According to this calculation, how many kilograms of soybeans do you need to make 600 kilograms of tofu?

7. An express train and an ordinary train leave from AB at the same time. The speed of express train is 90 kilometers per hour, and that of ordinary bus is 48 kilometers per hour. Two and a half hours later, two trains met on the road. How many kilometers is the railway between AB and two cities?

8. The distance between the two places is 28 kilometers, and AB two cars are driving in the same direction from both places at the same time. Car A travels 25 kilometers per hour and car B travels 32 kilometers per hour. Car A is in the front and car B is in the back. How many hours before B can catch up with A?

9. Cut a rectangular piece of paper with a length of 90 cm and a width of 20 cm into several square pieces of paper with the same size. It is required that the side length of a square is the largest, so as not to waste paper. How many squares can you cut?

10. In order to green the highway, the Bureau of Landscape Architecture planted a tree every 4 meters on both sides of a section of highway, and planted 74 trees at a time. Now it plans to plant a tree every 6 meters. So, how many trees will not be transplanted?

1 1, Party A has 14.8 yuan and Party B has 15.2 yuan. They want to buy a football together. The price of a football is twice their money. How much is a football and how much do they lack?

12. A machine plows 15 hectares in 3 hours. According to this calculation, how many hours does it take for five machines to plow 75 hectares?

13. There are 14 boxes of duck eggs in the store. Sold 250 kilograms, leaving 4 boxes of 20 kilograms. How many kilograms are there in each box of duck eggs?

14. bright primary school donated books to mountain students, with 240 books in grade four, twice as many as in grade five, and more books in grade six than in grade five 120. How many books did he donate per grade on average?

15. The grain store delivered 20 bags of rice and 20 bags of flour, each of which was 90kg of rice and 25kg of flour. How many kilograms more rice is brought in than flour? (Answer in two ways)

16. Two ropes * * * are 48.4m long. After cutting 6.4 meters from the first rope, the second rope is 6 meters more than the remaining two of the first rope. How long are the two ropes?

17. Students in Grade 4 and Grade 5 collect tree species, and the students in Grade 4 collect tree species 18.6 kg, and the students in Grade 4 collect 2.5 kg less than those in Grade 5. How many kilograms of tree species were collected in the second grade?

18. When a workshop used to consume 2,450 kW o per month, the original annual electricity consumption can be increased by 2 months after energy-saving activities. How many kilowatt hours does this workshop save on average every month?

19. The students took part in tree planting activities. 96 students in Grade 4 * * *, each of whom planted 3 trees. There are 87 people in the fifth grade, each of whom planted 4 trees. How many more trees were planted in the fifth grade than in the fourth grade?

20. Six students in the first group scored 86, 79, 98, 100, 89 and 94 respectively in the math test. What is their average score?

2 1. A car travels for 3 hours 135km, and an airplane is 28 times faster than a car, 60km less. This plane

How many kilometers does the plane fly per hour?

A clothing factory produced 850 suits in five days. According to this calculation, how many suits are produced a month? (30 days a month)

23. The store delivered 8 baskets of apples, 12 baskets of pears, with 38 kg of apples and 42 kg of pears in each basket. How many kilograms of fruit did this shop ship?

24. A rectangular piece of land is four times as long as it is wide. If the length is reduced by 5 meters, the width is increased by 2 meters, and the area is increased by 35 square meters compared with the original rectangle, find the area of the original rectangle.

25. To build an expressway, it is planned to build 1.2km every day, which is 0.2km less than the actual situation. It was finished five days in advance. What is the total length of this road?

26. The speed of the plane is 1044 km per hour, which is 14.5 times that of the train, and the speed of the train is10.6 times that of the car. So how many kilometers per hour is the car?

27. What is the quotient of the sum of1.2 and 0.4 multiplied by the product of 6 and divided by 4.8?

28. The weight of whale is 37.5 times that of elephant, 12 ton. It is known that the weight of a whale is 162 tons. How much does an elephant weigh?

29. There are two bookshelves, A and B. It is known that there are 540 books in bookshelf A, which is 30 books less than that in bookshelf B. How many books are there in bookshelf B?

30. parts manufactured by a and b. A made 240 yuan, 40 yuan more than B. How many pieces did b make?

3 1. There are 350 students in Peiying Primary School, which is three times less than that in Hongxing Primary School. 19 students. How many students are there in Hongxing Primary School?

32. The fruit shop sent 340 Jin of oranges, 80 Jin less than apples. How many kilograms of apples were delivered?

It costs more 2.2 yuan to buy four pens than five ballpoint pens. The price of each ballpoint pen is 0.6 yuan. How much is each pen?

34.AB is 360 kilometers apart. A truck drove from A to B 1.5 hours later, a bus set off from B to A, with a speed of 40 kilometers per hour and a speed of 42 kilometers per hour. How many hours will it take for the two cars to meet?

35. The store returned 250 Jin of apples and oranges, and the weight of apples was 1.5 times that of oranges. How many kilograms of apples and oranges were returned?

36. An engineering team built a road. It was originally planned to build 4.2 kilometers a day and finish it in 20 days. In fact, 1.8 km was built in one day. How many days did it actually finish?

This chemical plant produces a batch of raw materials. If you produce 432 kilograms a day, it will take 25 days to complete. In fact, it produces 108 kg every day. Actually, it will take a few days to finish.

38.2. 1 What is more than 4 times of 2.5?

39. What is 99 times more than100?

40.AB is 560 kilometers apart. One car travels from A to B at a speed of 48 kilometers per hour, and the other car travels from B to A at a speed of 32 kilometers per hour. How many kilometers apart are the two cars five hours after they leave the two places?

4 1. The circumference of the rectangle is 9.8 cm, and the known length is 0.5 cm more than the width. What is the length, width and area of this rectangle? 1. To transport 29.5 tons of coal, transport it three times by a truck with a load of 4 tons, and transport the rest by a truck with a load of 2.5 tons. How many times will it take to complete?

42. The trapezoidal site covers an area of 90 square meters, with an upper floor of 7 meters and a lower floor of 1 1 meter. How high is it?

43. A workshop plans to produce 5,480 parts in April. It has been in production for 9 days, and there are 908 more to complete the production plan. How many pieces will be produced on average every day in these 9 days?

44, AB two cars are 272km apart at the same time. After three hours, the two cars are still17km apart. A travels 45 kilometers per hour, and B travels how many kilometers per hour?

45. There are two classes in grade six in a school, and the average score in mathematics last semester is 85. There are 40 students in six classes (1) with an average score of 87. 1. There are 42 students in Class Six (2). What is the average score?

46. The school bought 10 boxes of chalk. 250 boxes were used, and there are 550 boxes left. How many boxes per box on average?

There are 200 students in the fourth grade. During extracurricular activities, 80 girls went to jump rope. The boys are divided into five groups to play football. How many people are in each group?

48. The canteen sent 150 kg of rice, which was 30 kg less than the flour. How many kilograms of flour does the canteen send?

49. There are 52 peach trees and 6 rows of pear trees in the orchard. There are 20 more pear trees than peach trees. How many pear trees are there in each row on average?

50. The area of a triangular land is 840 square meters, the bottom is 140 meters, and the height is how many meters? ;