(1) Xiaoming bought eight seedlings, paid 50 yuan and brought them back to 22 yuan. How much is each seedling?

(2) There is a parallelogram lawn in the school, with an area of 504m2, its height is 3 1.5m, and how long is its base?

(3) Two trucks * * * transport 70t of coal, and the coal transported by the other truck is 1.8 times that of the second truck. How many tons of coal do the two trucks transport?

(4) Light travels at a speed of 300,000 kilometers per second, which is about 7 times the length of the equator of the earth and more than 20,000 kilometers. What is the length of the earth's equator?

(5) The tractor factory plans to produce 7020 tractors, which will be produced for 6 days as planned, then 480 tractors a day, and then 9 days, just finishing the production task. How many tractors will be produced every day in the first six days?

(6) The distance between the two ports is 5 13km, and two warships start from both ports at the same time. After 4.5 hours, the distance between the two warships is still 72 kilometers. Assuming that warship A travels 48 kilometers per hour, how many kilometers does warship B travel per hour?

Solving application problems with column equations (***24 points)

1. Make a rectangle with 76 cm wire. What should be the width and length of 16 cm?

2. I bought 8 kg of cucumber and 6 kg of eggplant in the canteen and handed them over to 15 yuan and got them back 1.4 yuan. Cucumber is 0.8 yuan per kilogram. How much is eggplant per kilogram?

3. The forestry team planted four times as many poplars as willow trees, and 54 more poplars than willow trees. How many poplars are there?

The distance between the two places is 400 kilometers. Two cars, A and B, are driving from two places at the same time. Car A travels 38 kilometers per hour, while car B travels 42 kilometers per hour. A few hours later, the distance between the two cars was 40 kilometers.

There are 380 pear and peach trees in the orchard. The number of peach trees is three times that of pear trees, with eight more trees. How many peach trees and pear trees are there?

6. There are two barrels of oil, barrel A has 45 kilograms of oil and barrel B has 24 kilograms of oil. How many kilograms of oil is poured from barrel A to barrel B, so that the weight of oil in barrel A and barrel B is equal?

Application problems (1,10,2-3, 12, *** 34)

2. The distance between Party A and Party B is 226 kilometers, and buses and trucks depart from Party A and Party B respectively at the same time. After 2.5 hours, the distance between the two cars is 46 kilometers, and the bus speed is 40 kilometers per hour. How many kilometers does this truck travel per hour? (column equation solution)

3. Two road construction teams of Party A and Party B jointly build a road with a length of142.2km. Party A will build 5.6km every day, which is 0.6km more than that of Party B. After the two teams jointly build 12 days, Party B will finish it alone. How many days will it take?

Find the area of the shaded part. (Unit: decimeter) (Answer in two ways)

2. The distance between Party A and Party B is 226 kilometers, and buses and trucks depart from Party A and Party B respectively at the same time. After 2.5 hours, the distance between the two cars is 46 kilometers, and the bus speed is 40 kilometers per hour. How many kilometers does this truck travel per hour? (column equation solution)

3. Two road construction teams of Party A and Party B jointly build a road with a length of142.2km. Party A will build 5.6km every day, which is 0.6km more than that of Party B. After the two teams jointly build 12 days, Party B will finish it alone. How many days will it take?

Application questions (8 points for each small question *** 32 points)

1. xinwei machinery factory planned to produce 1500 machine tools throughout the year, and actually completed 1.2 times as many as planned 10 months. According to this calculation, how many machine tools can be actually produced in the whole year? How many units have been overfulfilled?

2. Five masters can process 750 parts in three hours, so how many more parts can eight masters process in four hours?

The distance between Party A and Party B is 240 kilometers. Two cars, A and B, are driving in opposite directions at the same time. The speed of car A is 45 kilometers per hour, which is 4 kilometers less than that of car B. How many kilometers are the two cars apart after 2.5 hours?

4. A trapezoidal orchard with an upper bottom of 13.8m, a lower bottom of 26.2m and a height of 35.4m If each fruit tree covers an area of 2m, how many fruit trees can be planted in this orchard?