Application problems of the final examination paper of the first volume of mathematics in the fourth grade of primary school.
1, uncle worker made 24 parts in 3 hours. According to this calculation, how many parts did he make in 8 hours? Last semester
2. Uncle Wang took 1500 yuan to buy fertilizer, bought 9 bags of fertilizer, and brought them back 15 yuan. How much is each bag of fertilizer?
3. Uncle Zhang bought 15 piglets for 7455 yuan and wants to buy more.
How much does he have to prepare to buy 30 such piglets?
4, a pair of leather shoes 105 yuan, the price of a dress is shoes.
More than twice as much. How much does it cost mom to buy a pair of shoes and a dress?
5. Yucai Primary School should divide 180 Young Pioneers into 6 teams on average, and each team will be divided into 5 groups. How many young pioneers are there in each group on average?
6. Xiaorong raised 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?
7. A pencil is 7 points more expensive than an eraser. A ballpoint pen can buy 1 1 pencils. It is known that an eraser is 8 points. How much is a ballpoint pen?
8. Zhang Jun is 45 years old and Xiaogang is 5 years old. How many times will Zhang Jun be bigger than Xiaogang in three years?
9. Xiaoming has the money from 40 yuan, which is more than 6 yuan from Xiao Qiang. They are * * *.
how much is it? How much did Xiao Ming give Xiao Qiang? They both have the same amount of money.
10. There are 42 male workers in a factory, and the number of female workers is three times less than that of male workers. 1 1. How many workers are there in this factory?
1 1. Uncle Wang opened fertilizer in the fertilizer plant. It took five hours to go at 48 kilometers per hour, and only three hours to come back empty. What was the average speed when I came back? What is the average speed of going back and forth?
12. The school will distribute exercise books to 8 classes, each class has 200 copies, and 100 copies will be reserved for awarding prizes. How many exercise books should schools buy?
13, the school canteen carries 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?
14. A binding team has to bind 2640 books, and 240 books have been bound in 3 hours. According to this calculation, how many hours will the remaining books be bound?
In grades 15 and 4, 244 books will be restored for the library. 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?
16, the 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 5 tons. How many times will it be shipped?
17. Flowers 120 Buy a pot of flowers, 4 pots for free, and 25 pots for school. What is the lowest cost?
18. An elephant needs to eat 350 kilograms of food a day. The breeder prepared 6 tons of food, enough for the elephant to eat for 20 days?
19, buy a bunch of flowers, 20 yuan, buy four 1. Aunt Li buys 4 bundles at a time. How much cheaper is each bundle?
20. In fruit shops, 2 kilograms of apples are sold in 5 yuan, and 3 kilograms of bananas are sold at 12 yuan. Mother is going to buy 6 kilograms of apples and bananas each. How much should she pay?
2 1. The PE teacher bought 8 boxes of badminton, each box was 12, and the price was ***288 yuan. How much is badminton on average?
On the 22nd, Li Shifu produced a batch of spare parts, which were originally planned to be less on average.
Production of 50, 6 hours to complete. The task was actually completed in five hours. How many pieces are actually produced per hour?
The shop sent five boxes of fruit, weighing 50 kilograms. If these fruits are packed in small boxes, the weight of each box is half of the original. How many boxes can these fruits hold?
24.84 kg of soybean can squeeze out 12 kg of oil. According to this calculation, how many kilograms of soybeans do you need to squeeze 120 kilograms of oil?
25. There are 36 students in the school sports group, and the number of students in the art group is twice as small as that in the sports group, 12. How many people are there in the school art troupe?
26. In the fourth grade, I wanted to buy five photo albums and five mechanical pencil to reward three outstanding students. I spent 28.75 yuan on the album and 6. 15 yuan on mechanical pencil. How much is an album more expensive than mechanical pencil?
27. Dongguan Primary School sports team has 7 1 person, including basketball players 15. The number of track and field athletes is 2.4 times that of basketball players, and the rest are football players. How many people are there in the football team?
28. The store shipped 16 baskets of apples, each weighing 42.5 kilograms. Pears delivered are less than apples 120kg. How many kilograms of pears? .
29, students do exercises, every 25 people in a row, 30 rows of boys and 28 rows of girls. How many more boys than girls?
30. Xiao Ming read a story book with 180 pages, and read it for 3 days, with an average of 24 pages a day. The rest read an average of 36 pages a day. How many days will it take to complete?
Answers to the application questions in the final examination paper of the fourth grade mathematics in primary school
1, parts produced per hour? Time = total number of parts
Solution: (24? 3)? 8 =8? 8 =64 (pieces)
He made 64 parts in eight hours.
2. Total price? Quantity = unit price
Solution: (1500- 15)? 9 = 1485? 9 = 165 (yuan)
A: Fertilizer per bag 165 yuan.
3. unit price? Quantity = total price
Solution: (7455? 15)? 30 =497? 30 = 149 10 (yuan)
A: He has to prepare 149 10 yuan.
4. Payment for leather shoes and clothing = * * * Payment scheme: 105+( 105? 2) =105+210 = 315 (yuan)
A: Mom needs 3 15 yuan to buy a pair of shoes and a dress.
5. The total number of players? Number of groups = number of people in each group
Solution: 180? (6? 5) = 180? 30 =6 (Name)
A: There are 6 young pioneers in each group on average.
6, eggs+duck eggs = annual egg production
Solution: 45? 13=585(㎏) 18? 12=2 16(㎏) 585+2 16=80 1(㎏)
Answer: These chickens and ducks can produce 80 1 kg eggs a year.
7. 1 1 Price of pencil = 1 Price of ballpoint pen: (8+7)? 1 1 = 15? 1 1
= 165 (minutes) 165 = 1 RMB 6.5. Answer: one ballpoint pen 1 RMB 6.5.
What is Zhang Jun's age in 8 or 3 years? Age of Xiaogang after 3 years = Zhang Jun's age after 3 years is a multiple of Xiaogang's age after 3 years.
Solution (45+3)? (5+3) =48? 8 =6 (times)
In three years, Zhang Jun will be six times as old as Xiaogang.
9. Xiaoming's money+Xiao Qiang's money = total.
Xiaoming's money-the average of two people = the money Xiaoming wants to give to Xiao Qiang.
Solution: 40+(40-6) 40-( 40+34)? 2 =40+34 =40-37 =74 (yuan) =3 (yuan)
They have 74 yuan. Xiao Ming gave Xiao Qiang as much money as Sanyuan.
10, number of male employees+number of female employees = total.
Solution: 42+(42? 3-11) = 42+115 =157 (name)
There are 157 workers in this factory.
1 1, distance? Time = speed
Solution: (48? 5)? 3 240? 2? (3+5) = 240 ? 3 = 480? eight
=80 km =60 km
Answer: When returning, the average journey is 80 kilometers per hour. The average speed back and forth is 60 kilometers.
12, send 8 classes+surplus = should be bought.
Solution: 8? 200+100 =1600+100 =1700 (Ben)
A: Schools should buy 1700 exercise books.
13, total? Burning every day = the number of days of burning.
Solution: 1 ton = 1000 kg 1000? 40=25 kg
1000? (25-5)
= 1000? 20 =50 (days)
This batch of coal can burn for 50 days.
14, the remaining books? Load per hour = binding time
Solution: (2640-240)? (240? 3) =2400? 80 =30 (hours)
A: It will take another 30 hours for the remaining books to be bound.
15, the remaining books? 3 days = installed every day.
Solution: 244-(49+5 1) 144? 3=48 (Ben) =244- 100 = 144 (Ben)
A: On average, 48 books are written every day.
16, solution: 40-(4? 5)=20 (tons) 20? 5=4 (times)
A: It will be delivered in four installments.
17, buy 5 pots of flowers and 4 pots of money, but each pot of flowers [120? 4? (4+ 1)] yuan. Unit price? Quantity = total price. (25 pots is a multiple of 5 pots)
Solution: [120? 4? (4+ 1)]? 25 =96? 25 =2400 (yuan)
A: It will cost at least 2400 yuan.
18, solution: 350? 20=7000 (kg) 7000 kg =7 tons 7 tons > 6 tons
A: Not enough.
19, solution: 20-[20? 4? (4+ 1)] =20- 16 =4 (yuan)
A: Cheap 4 yuan money per bundle.
20. Solution: 5? 2? 6+ 12? 3? 6 = 15+24 =39 (yuan)
A: The money should be paid to 39 yuan.
2 1、288? (8? 12) =288? 96 =3 (yuan)
A: The average badminton is 3 yuan.
22. Solution: 6? 50? 5 =300? 5 =60 (pieces)
A: Actually, the average production is 60 units per hour.
23. Solution: 50? [50? 5? 2] =50? 5 = 10 (box)
A: These fruits can be packed in 10 boxes.
24. What soybeans do you need per kilogram of oil? Total oil = required soybeans
Solution: (84? 12)? 120
=7? 120 =840 (kg)
Answer: To extract 120 kg of oil, you need 840 kg of soybeans.
25, solution: 36? 2- 12 =72- 12 =60 (person)
A: There are 60 people in the school art troupe.
26. solution: 28.75? 5-6. 15? 5 =5.75- 1.23 =4.52 (yuan)
A: An album is 4.52 yuan more expensive than mechanical pencil.
27. Solution: 7 1- 15- 15? 2.4 =7 1- 15-36 =20 (person)
There are 20 people on the football team.
28. Solution: (16? 42.5)? 2- 120 =670? 2-120 =1340-120 =1120 (kg)
Answer: The pear delivered is1120kg.
29. Solution: (30-28)? 25 =2? 25 =50 (person)
There are 50 more boys than girls.
30. Solution: (180-3? 24)? 36 = 108? 36 =3 (days)
A: It takes three days to read it.
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