Dad divided a big carp caught into three parts: the first part, the middle part and the last part. The weight of the middle section is just 1kg less than the sum of the weights of the front and rear sections, and the weight of the rear section is equal to half of the weight of the middle section and the sum of the weight of the front section. I only know that the front section weighs 2 kilograms. How much does this big carp weigh?
A big shark, its head is 3 meters long, its body length is equal to its head length plus its tail length, and its tail length is equal to half of its head length plus its body length. How long is this big shark?
There is a piece of wood, and I don't know its length. Measure with a rope. The rope is 1.5 meters. If you fold the rope in half and then measure it, will it be enough? Only 0.4 meters short. How long is this rope?
Exercise 2:
Party A, Party B and Party C put out the same amount of money to buy a batch of apples. At the time of delivery, both parties took 24 kilograms more than Party C. At the time of checkout, both parties paid 24 yuan to Party C. How much is the apple per kilogram?
Party A and Party B spent the same money on the same pencil. When dividing pencils, Party A takes 13 pencils and Party B takes 7 pencils. So A gave another 60 cents. How much is each pencil?
During the spring outing, Xiaoming and Xiaojun took out the same amount of money and bought six loaves of bread. At noon, Xiaohong found that she didn't bring any food. As a result, the three of them shared the bread equally, and Xiaohong gave money to Xiaoming and Xiaojun 2.2 yuan respectively. How much is a loaf of bread?
On Children's Day, students made paper flowers, Xiaohua bought 7 pieces of red paper, Xiaoying bought 5 pieces of yellow paper with the same price as the red paper, and the teacher divided these papers equally between Xiaoying and Obana. As a result, the other two students gave the teacher 9 yuan. Ask the teacher how to distribute the 9 yuan to Obana Xiaoying.
Exercise 3
A city has 177 tons of goods to be shipped to B. The load capacity of large trucks is 5 tons, and that of small trucks is 2 tons. The fuel consumption of large and small trucks is 10 liter and 5 liter respectively. How many large trucks and small trucks consume the least fuel during transportation?
There are five contestants who got 404 points in a math contest. Everyone's scores are different, and they are all integers. If the highest score is 90, how many points does the player with the lowest score get at least?
How many stamps can I buy with 1 yuan for 4, 8 and 1 min * *15 at most?
There are 60 students in a class, 42 of whom can swim, 46 can drive, 50 can skate and 55 can play table tennis. I'm sure at least how many people?
Exercise 4:
There is a residential building, and each family subscribes to two different newspapers. This residential building subscribes to three newspapers, including 34 Beijing Daily, 30 Jianghai Evening News and 22 TV Newspapers. So how many companies subscribe to Jianghai Evening News and TV News?
The students in Class Five (1) all brought two kinds of fruits to express their condolences to the uncle of the People's Liberation Army. The whole class brought three kinds of fruits, including 40 apples, 32 pears and 26 oranges. So how many students have pears and oranges?
In the celebration of Children's Day on June 1st, each student of a team held two different balloons in his hand. * * * There are three colors of red, yellow and green, including 56 kinds of red, 60 kinds of yellow and 46 kinds of green. So, how many students were given red and green balloons?
The school has set up three interest groups: music, ball games and art. Everyone in the first group participated in two of them, of which 9 participated in the ball games group, 6 participated in the art group and 7 participated in the activities of the music group. Q: How many students participated in art and music group activities?
Exercise 5:
A ship had a water leakage accident and immediately installed two pumps. By this time, 800 barrels of water had leaked. One pump pumps 18 barrels per minute and the other pumps 14 barrels per minute. Pump the water up in 50 minutes. How many barrels of water leak every minute?
A pool can hold 8 tons of water, and the pool is equipped with water inlet pipe and water outlet pipe. Two-pronged approach can put a pool of water in 20 minutes. It is known that the water inlet pipe feeds 0.8 tons of water into the pool every minute. How many tons of water does the outlet pipe need per minute?
Original cement of a construction site 120 tons. Due to the needs of the project, five trucks were sent to transport cement to the construction site, with an average of 25 tons per truck per day. Three days later, there was 102 tons of cement on the construction site. How many tons of cement does this construction site use on average every day?
A pile of goods weighs 96 tons. Team a 16 hour can finish it, and team b can finish it in 24 hours. If two teams work together to deliver at the same time. How many hours can it be delivered?
A batch of parts can be completed in 12 days through the cooperation of master and apprentice, and the teacher paid the fee for 3 days in advance. But someone was on a business trip, and then he did it 1 day, and * * * completed 3/20 of the task. If only the teacher pays for this batch of parts, how many days can it be completed?
There is a bunker on the school playground, which is 4m long, 2m wide and 0.5m deep. Huangsha m×m= 1.4 tons. How many tons of yellow sand do you need if you fill up the bunker?
Geometric operation problem (unit: cm)
Cut off the largest cylinder in the cuboid and find the volume of the rest.
Xinxing machinery factory expanded its factory building, with the original planned investment of 4 million yuan and the actual investment of 3.6 million yuan, which percentage was saved?
A road construction team paved a road. It was originally planned to lay 1.6 km every day and complete it in 30 days. Actually, it was 0.8 kilometers more paved than originally planned. How many days did it actually take? (Use proportional solution)
The bottom radius of the cylindrical glass container filled with water is 6 cm. Now put a stone in the container and the water level will rise by 4 cm. What is the volume of this stone in cubic centimeters?
Wang Hua read an extracurricular reading. On the first day, he read 20% of the book, and the next day, he read the remaining 30%. 140 pages left. How many pages are there in this extracurricular reading?
Xiaoming went to the West Lake 6 kilometers away. Please answer according to the following dotted statistical chart:
(1) How long did Xiao Ming play in the West Lake?
(2) If we keep walking from the beginning without rest, when can we reach the West Lake?
(3) Find out how fast Xiao Ming came back by bike?