2. The length of a steel pipe is10m. Cut off 7/ 10 for the first time, and cut off the remaining 1/3 for the second time. How many meters are left?
3. After 2/3 of the expressway is completed, it is16.5km away from the midpoint. What is the total length of this highway?
4. The master and the apprentice made a batch of parts together, and the apprentice made 2/7 of the total, 2 1 less than the master. How many parts are there in this batch?
5. There is a batch of chemical fertilizers in the warehouse, and 2/5 of the total amount was taken out for the first time, and less than 1/3 of the total amount was taken out for the second time. At this time, there are 24 bags left in the warehouse. How many bags are taken out twice?
6. The distance between Party A and Party B is 1 152km. A bus and a truck leave from two places at the same time. Trucks run 72 kilometers per hour, 2/7 faster than buses. How many hours did it take for two cars to meet?
7. A coat is more expensive than a pair of trousers 160 yuan, in which the price of trousers is 3/5 of that of a coat. How much is a pair of trousers?
8. There are 60 black rabbits in the feeding group, and there are more white rabbits than black rabbits 1/5. How many white rabbits are there?
9. The school wants to dig an 80-meter-long sewer. 1/4 was dug on the first day, and 1/2 was dug on the second day. How many meters have you dug in two days? How many meters are left?
10. The circumference of a rectangle is 24 cm, and the length-width ratio is 2: 1. How many square centimeters is the area of this rectangle?
1 1. The sum of the sides of a cuboid is 96 cm, and the ratio of length, width and height is 3: 2:1. What is the volume of this cuboid?
12. The total length of a cuboid is 96 cm, the height is 4 cm, and the aspect ratio is 3 ∶2. What is the volume of this cuboid?
13. There are 42 computer interest groups in a school. The ratio of male to female is 4: 3. How many boys are there?
14. There are two baskets of fruits, and the first basket weighs 32kg. After taking out 20% from the second basket, the weight ratio of the two baskets of fruits is 4:3. How many kilograms were there in the original two baskets of fruit?
15. Make a 600g bean paste bun, and the ratio of flour, red beans and sugar is 3:2: 1. How many grams of flour, red beans and sugar do you need?
16, Xiao Ming reads story books. On the first day, he read 1/9 of the book, and the next day, he read 24 pages. The ratio of pages read in two days to remaining pages is 1: 4. How many pages are there in this book?
17, the ratio of the three internal angles of a triangle is 2:3:4. What are the degrees of these three internal angles?
18. The output value of a chemical fertilizer plant this year increased by 20% compared with last year, with an increase of 5 million yuan. What is the market value this year?
19. The fruit company stored a batch of apples. After selling 30% of the apples, we shipped 160 boxes, which was more than the original apples110. How many boxes of apples are there?
20. The original price of a commodity is 20% less than the current price, and the current price is 1028 yuan. What is the original price?
2 1. Interest earned from education savings is tax-free. Dad saved Xiao Xiao's education savings for three years, with an annual interest rate of 5.40%. Upon maturity, * * * received the principal and interest of 22,646 yuan. What is the principal of the education savings fund that Dad gave Xiao Xiaocun?
22. The clothing store bought two pieces of clothes at the same time, each of which earned 120 yuan, but one of them earned 20% and the other accompanied 20%. Did the two clothes sold by the clothing store make money or lose money?
23. The father is 43 years old and the daughter is 1 1 year old. A few years ago, my daughter was 20% older than my father.
24. 20% of less than 2/5 tons is () tons, and 30% of () tons is 60 tons.
25, a 200-page book, read 20%, and left () pages unread. 40% of the number A is equal to 50% of the number B. The number A is 120 and the number B is ().
26. A factory used 5,400 tons of water in the second half of April, saving 20% compared with the first half. How many tons of water were used in the first half of the year?
27. Zhang Ping has 500 yuan money and plans to deposit it in the bank for two years. There are two deposit methods. One is to save it for two years, with an annual interest rate of 2.43%. One is to save it for one year with an annual interest rate of 2.25%. When the first year expires, take out the principal and after-tax interest and deposit it for another year. Which method can I choose to get more after-tax interest?
28. Xiaoli's mother saved 5,000 yuan in the bank for a year, with an annual interest rate of 2.25%. When withdrawing money, the bank withheld and remitted 20% interest tax. How much interest tax was paid at maturity?
29, the flour yield of a wheat is 85%, to grind out 13.6 tons of flour, you need _ _ _ _ tons of such wheat.
30. There is a ring. The circumference of the inner circle is 3 1.4 cm, the circumference of the outer circle is 62.8 cm, and what is the width of the ring?
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