1, a truck and a bus leave from two places 504 kilometers apart at the same time and meet after 4.5 hours. The bus travels 64 kilometers per hour, and how many kilometers does the truck travel per hour?

A washing machine factory plans to produce 504 washing machines in May. In fact, it was completed 5/9 in the first half of the year and 2/3 in the second half. How many washing machines did it actually produce this month?

3. Party A completes a project in 8 days, and Party B 12 days ... Now after three days, Party A will do the rest alone. How many days will it take to complete?

There are 40 more peach trees than apricot trees in the orchard, and the number of apricot trees is 80% of peach trees. How many peach trees are there?

5. Conical sand pile with a bottom area of 3.6 square meters and a height of 1.2 meters. How high can you put this pile of sand in a bunker 2 meters long 1.5 meters wide?

6. The ratio of male to female students who participated in the math contest in a school was 6:5, and then five girls were added. At this time, the number of girls is 8/9 of the number of boys. How many girls took part in the math contest?

Eight, the application problem (1-3 each 4 points, 4-8 each 5 points, *** 37 points)

1. Machine tool factory produced 2400 machine tools last year, a decrease of 20% compared with last year. How many machine tools did it produce the year before last?

2. Harvest Primary School should plant 126 trees, and press 1? 3? 2 How many trees are distributed in the fourth, fifth and sixth grades, and how many are planted in the fifth grade?

3. Fruit shop delivered 14 baskets of pears, 35kg each, 16 baskets of apples, 30kg each. How many kilograms more pears are shipped than apples?

4. Pool A has 1 12 cubic meters of water, and Pool B has 120 cubic meters of water. 9 cubic meters of water flows from pool A to pool B every hour. After a few hours, the water in pool B is three times that of pool A. ..

Master Wang produced a batch of parts with the same machine tool. 1400 parts were produced in the first four days, and the remaining tasks were completed in two days. How many parts are there in this batch? (Answer in proportion)

6. There are two experimental fields, the first one is 3.5 hectares, with an average yield of 7200 kilograms of wheat per hectare; Plot No.2 covers an area of 1.5 hectares and produces * * * wheat 1 1.250 kg. How many kilograms of wheat do these two plots produce on average per hectare?

7. The overpass site used 72.5 tons of cement in the morning, and the weight of cement brought in in the afternoon was just equal to the weight of cement left in the morning. At this time, there is 174.2 tons of cement on site. What's the percentage of raw cement delivered this afternoon? (The percentage numerator retains one decimal place)

8. The distance between the two cities is 380 kilometers. A bus and a truck left two cities at the same time and met four hours later. It is known that the speed ratio between passenger cars and trucks is 1 1? 8. How many kilometers does the bus travel per hour more than the truck?

2. The construction team planned to dig 800 meters of canal in 20 days, and actually completed the task in 16 days. What percentage of the actual work efficiency of the construction team has been improved compared with the plan?

3. An express train and a local train travel in the opposite direction from Nanjing and Yangzhou at the same time, and the passing time is 3 hours.

/kloc-meet at 0/000 meters. It is known that the average speed of the express train is 75 kilometers per hour, and how many kilometers is the average speed of the local train?

The above is a savings deposit certificate of Uncle Zhang. If he has to pay 20% interest tax at maturity, how much interest can he actually get when his deposit expires?

The volume of cylindrical glass is 65,438+0,000 cubic centimeters. Now the ratio of water height to water height is 1: 1. After putting into the cone (the cone is completely immersed in water), the ratio of water height to water height is 3: 2. What is the volume of this cone?

6. The number of days and daily wages for the three construction teams A, B and C to complete a project are as follows:

Total daily wages of days spent by the construction team to complete the project alone (ten thousand yuan)

One piece 10 18

B 15 12

C 20 8

Please choose two engineering teams to cooperate on this project. If the construction period is tight and you want to finish it as soon as possible, which two teams should you choose to work together? How many days can it be finished? How much will each team get after completion?