7. The grain store bought a batch of oil and sold 3/ 10 of the total on the first day. The next day, it was 30 kilograms less than the first day, and it sold 330 kilograms in two days. How many kilograms is this batch of oil?
8. A cement factory 1 month produces 4.2 million tons of cement, which is 250,000 tons less than 1 month and 2/3 times that of February. How many tons were produced in two months?
9. A workshop processes 350 parts all day, and the number of parts processed in the morning is less than that processed in the afternoon 10. How many parts were processed this afternoon?
10. The travel expenses from A city to B city by train, from B city to C city by boat, and from A city to C city are * * * in 250 yuan. Now the train fare has gone up110, and the ship fare has gone up 1/5. Excuse me, the fare from city A to city C is * * 280 yuan.
1 1. Xiaoming and Xiaohua * * * each have several yuan deposits, of which Xiaoming's deposits account for 3/5 of the total. After Xiao Ming withdrew 12 yuan, his deposit accounted for 1/2 of the total. How much money did Xiaoming and Xiaohua originally save?
12. When a train arrives, 1/4 people get off and 300 people get on. At this time, the number of people on the train is 9/ 10. How many people were on the train before arriving at the station?
13. In a shopping mall, the number of black-and-white TV sets is 4/7 of that of color TV sets. After selling 3/5 color TV sets, the remaining two TV sets are equal. How many original color TVs are there?
14. A school has two sports teams. There are 50 people in Team A. If 110 is transferred from Team A to Team B, the number of people in Team A is1less than 23/25 of the number of people in Team B. How many people are there in Team B?
15. The previous annual income of a farm was 475,000 yuan, which increased to 745,000 yuan last year, of which the agricultural income increased by 17/25, which was 4/9 times that of the previous year. What was the income of this farm last year?
16. The tractor planted a piece of land. The land of 1/4 was cultivated on the first day. On the second day, more 10 hectares were cultivated than on the first day, and the remaining 35 hectares were cultivated on the third day. How many hectares is this land?
17. The car company originally had 126 buses, of which buses accounted for 4/7. Later, I bought several buses. At this time, the number of buses is 65438+ 0.2 times of the number of buses. How many cars does the car company have now?
18. On the first day, two-fifths of all the cement was shipped from the construction site, the rest on the second day 1/3, and the rest on the third day/3. At this time, 150 ton has not been transported. How many tons of cement are there?
19. Master and apprentice * * * process 156 parts, master processes one every 5 minutes, and apprentice processes 1 part every 8 minutes. How many parts were processed when the task was completed?
20. The machine tool factory planned to produce 200 small machine tools a month, and as a result, 3/5 of them were completed in the first half of the month, and as many in the second half as in the first half. How many more small machine tools have been produced this month than originally planned? (Various answers)
1. Circle a rectangle with 48 cm wire, and the length-width ratio of the rectangle is 3: 5. Find the area of a rectangle.