2. Furniture stores shipped 45 wooden chairs, and the shipment of folding chairs 10 was more than three times that of wooden chairs. How many chairs have been shipped from the furniture store?
3. A has 14.8 yuan and 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?
4. The car travels for 3 hours 135km, and the plane is 28 times faster than the car and flies 60km less. How many kilometers does this plane fly per hour?
Students take part in tree planting activities. There are 96 fourth-grade students, each with 3 trees, and 87 fifth-grade students with 4 trees. How many more trees were planted in the fifth grade than in the fourth grade?
6. 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?
7. 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?
8. There are 14 boxes of duck eggs in the shop. After selling 250 Jin, there are still 4 boxes of 20 Jin left, each with ducks.
9. The stationery factory wants to produce 540 pieces of stationery, which has been produced for six days, with an average of 30 pieces per day, and the remaining 40 pieces per day. How many days will it take to complete?
10. The convenience canteen bought 300 kg of flour, which was planned to be finished on 10, but actually it was 5 kg less every day. How long can these flours last?
1 1. Two trains A and B leave from two stations 580 kilometers apart at the same time. A car travels 70 kilometers per hour, and B car is 5 kilometers faster than A car per hour. How many hours do the two trains meet?
12. Two cars are driving relatively from two places. Car A travels 70 kilometers per hour and car B travels 80 kilometers per hour. It takes 1 hour for a car to leave, and then the two cars meet in 2.5 hours. How long is the road between these two places?
13. 12 people dug the flower pond with eight shovels and adopted the method of "stopping people without stopping horses". They worked for six hours, and each person dug for several hours on average.
14. Aunt Zhang entertained children with a few pieces of candy during the Spring Festival and began to visit 12 children, with an average of just 8 pieces per person; I went to find several children before I shared them equally. As a result, an average of 6 yuan per person was just eaten. Then I went to some children. `
15. A workshop plans to produce 180 submersible pumps in 12 days. Due to poor planning, the task was postponed for three days. How many units are produced less than originally planned every day on average?
16. A workshop plans to produce a batch of submersible pumps on 12. Due to poor planning, three pumps were produced less than originally planned every day, and the task was delayed for two days. How many pumps are there in this batch?
17. A workshop planned to produce 2400 parts in April, but the actual time was 5 days shorter, but the task was overfulfilled by 25%. How many more parts are produced on average every day than originally planned?
18. Students A, B and C * * bought the exercise book of 15. At that time, Party A handed in 12 copies, Party B handed in 3 copies and Party C didn't. Because three people want the same amount, B gave A 0.3 yuan and C gave A when they got home. How much did A * * * get back?
19. Kinser travels between east and west 36 miles apart. He walked 7.2 miles an hour from east to west, and the return trip from west to east took an hour less than when he came. What is his average speed?
20. Zhao Bing goes to a place by bike, and travels an average of 36 miles per hour a day. It is known that he drives an average of 40 miles per hour in the morning and takes a rest after riding for 3 hours. In the afternoon, he averaged 33 miles per hour. How many hours did he ride in the afternoon?