1, 7 bags of rice and 3 bags of flour * * * weigh 425 kilograms, and the same 3 bags of rice and 7 bags of flour * * * weigh 325 kilograms. Find the weight of each bag of rice and flour.

2. A barrel of oil weighs 8 kilograms, and after pouring out half of it, the barrel weighs 4.5 kilograms. How much does a barrel of oil weigh?

Divide a big fish into three parts: head, body and tail. The weight of fish tail is 4 kg, the weight of fish head is equal to the weight of fish tail plus half the weight of fish body, and the weight of fish body is equal to the weight of fish head plus the weight of fish tail. How much does this big fish weigh?

The school stipulates to arrive at school at 8 am. To go to school in Wang Qiang, if you walk 60 meters per minute, you can get to school 10 minutes earlier, and if you walk 50 meters per minute, you can get to school 8 minutes earlier. When did Wang Qiang leave home? How far is his home from school?

5. There are four classes in grade six in a school, including class one, class two, 8 1 person, class two, class three, 83 people, and class three, class four, 86 people. One class has two more people than class four. How many people are there in each of the four classes?

6. Xiaoming and Xiaohong went to the store to buy composition books, and they paid the same amount of money. They bought 20 books, and Xiaohong took four more than Xiaoming, so Xiaohong gave Xiaoming 1.2 yuan money. How much did Xiao Ming and Xiao Honghua spend?

7. The school organized 235 people to take part in labor. Half of the boys and 65,438+00 girls picked tomatoes, 65,438+05 girls picked lentils, and the rest of the students went to work in the yard. The number of boys and girls working in the yard is equal. * * * How many people are working in the hospital?

8. Warehouse A has 58 tons of goods and warehouse B has 32 tons of goods. Now warehouse A has 4 tons of goods every day, and warehouse B has 20 tons of goods every day. How many days later, the goods in warehouse B are twice as much as those in warehouse A?

9. The garment factory plans to use 2.2 meters of cloth for each set of children's wear. After improving the cutting method, each set saves 0.2 meters of cloth. You can make the original cloth for 600 sets of clothes. How many sets can we make now?

10. Each adult ticket to the museum is for 5 yuan, and two adults can bring one child for free, and each child ticket is for 4 yuan. If you buy a group of five people, each 3.8 yuan. Now there are three teachers and 14 children visiting. How much will it cost at least?

1 1, Xiao Wang spent 140 yuan bought a coat, a hat and a pair of shoes. A coat costs more than a hat, and a coat plus a hat costs more than shoes 120 yuan. How much is a pair of shoes?

12, Party A, Party B and Party C * * * went out of 27 yuan to buy a batch of exercise books in partnership, each with the same contribution. Since Party A needs 15 less than Party C, and both parties need the same amount, both parties give Party A 1.5 yuan. How many copies did the three partners buy?

13. The TV factory has received a batch of production tasks, and plans to produce 120 TV sets every day, which can complete the task on schedule. Actually, 10 sets were produced more than planned every day, and the task was completed 4 days ahead of schedule. How many TV sets are there in this batch?

14, two baskets of apples, A basket is more than B basket 19 kg. How many kilograms are taken from the first basket and put into the second basket, so that the number of kilograms of apples in the second basket is 3 kilograms more than that in the first basket?

Second, the trip.

1.A, B two cars start from east and west at the same time. Car A travels 56 kilometers per hour and car B travels 48 kilometers per hour. The two cars met at a distance of 32 kilometers from the midpoint. What's the distance between east and west?

2. Both cars of Party A and Party B travel from East Station to West Station at the same time. Car A travels12km more than car B every hour. After four and a half hours, car A arrives at the West Station without stopping, and immediately returns from the original road, and meets car B at a distance of 31.5km from the West Station. How many kilometers does car A travel per hour?

3. Two people ride bicycles along a 900-meter-long circular track. They traveled in opposite directions from the same place, so they met once in 18 minutes. If they drive in the same direction, and the fast train catches up with the slow train once in 180 minutes, how fast can they ride bicycles?

Both brother and sister leave home for school at the same time. My brother walks 90 meters per minute and my sister walks 60 meters per minute. When my brother arrived at the school gate, he found that he had forgotten his textbook. He immediately went home to get it along the original road and met his sister at 0/80 meters away from the school/kloc-. How far is their home from school?

5. There is a bus with a body 15 meters on the road, traveling from east to west, with a speed of 18 kilometers per hour. On the sidewalk by the roadside, there are two young people, A and B, practicing long-distance running. A from east to west, b from west to east. At a certain moment, the car caught up with A, and after 6 seconds, the car left A; Half a minute later, the car met the oncoming B; Two seconds later, the car left B. How many seconds later will A and B meet?

6. The distance between Party A and Party B is 360 kilometers, and buses and trucks leave from Party A for Party B at the same time. The speed of the truck is 60 kilometers per hour and the speed of the bus is 40 kilometers per hour. After the truck arrives at the second place, it stays for 0.5 hours and returns to the first place at the original speed. A few hours after starting from the first place, the two cars met.

7. The train and the local train leave from Party A and Party B at the same time, and meet in 12 hours. After the encounter, the express train took another 8 hours to reach B, and how many hours did the local train take to reach A?

8. The distance between the two places is 380 kilometers. There are two cars leaving from two places at the same time. Originally, car A planned to run at 36 kilometers per hour and car B planned to run at 40 kilometers per hour, but when driving, car A changed speed and left at 40 kilometers per hour. How many kilometers did B car travel less than originally planned when they met?

9. The distance between east and west towns is 240 kilometers. A bus goes from Dongzhen to Xizhen at 8 am, and a truck goes from Xizhen to Dongzhen at 9 am. At noon, the two cars met at the midpoint of the two towns. If the two cars leave at 8: 00 a.m. and the speed remains the same, how many kilometers will the two cars be apart by morning 10?