1, processing a batch of parts, A first processes 3/5 of this batch of parts, and then B processes the remaining 3/4. It is known that the number of parts processed by A is 60 more than that of B. How many parts are there in this batch?
2. The library bought ***340 scientific and literary books, and the number of literary books of13 is equal to that of 4/5. How many books did you each buy?
3. After a basket of apples was sold 1/5, it sold 6 kilograms, which is exactly the remaining 1/2. How many kilograms is this basket of apples?
There are two plastic ropes, one is 80 meters long and the other is 40 meters long. If the same length is cut from each of the two ropes, the remaining length of the short rope is 2/7 of that of the long rope. How many meters were each of the two ropes cut?
Grandpa is 60 years old and grandson is 1 1 year old. How old is the grandson when his age is 3/ 10 of grandpa's?
6. Bookstores distributed ***240 scientific and literary books, accounting for 1/6, and later distributed a batch of scientific and technological books. At this time, science and technology books account for 3/65,438+065,438+0 of the total number of the two books. How many books are there now?
7. When Xiaoli reads a book, the ratio of pages read and unread is 1: 4. If she reads 15 pages again, the ratio of pages read and unread is 2: 5. How many pages are there in this book?
8. The output of TV sets produced by Guanghua TV Factory in the first half of the year accounts for 8/5 of the annual production plan. At this rate, the annual output can exceed 1000 units. How many TV sets did this factory produce in the first half of the year?
9. There are 480 male and female employees in a factory, of which 60% are male employees. Several male employees were transferred for other jobs, and the number of male employees accounted for 36% of the total number. How many people have been transferred?
10. There are 36 original football and basketball schools, of which the ratio of football to basketball is 7: 2. After buying some football, football accounts for .80% of the total number of football and basketball. How many football and basketball are there in the school now?
Two warehouses, 1 1 and A&B * *, have 180 tons of grain. Now, after the 1/6 grain from warehouse A is transported into warehouse B, the grain storage ratio of warehouse A and warehouse B is 5: 4. How many tons of grain are there in each warehouse?
12, the ratio of the number of people in science and technology group to the number of people in composition group is 9: 10, and the ratio of the number of people in composition group to the number of people in mathematics group is 5: 7. There are 69 people in the known math group and science and technology group. How many people are there in the math group than in the composition group?
13. The weight ratio of these two bags of salt is 3: 2. After 70g is taken out of bag A and put into bag B, the weight ratio of the two bags of salt is 4: 5. How many grams of salt are there in the original bag A?
14. Xiaohua's family charged 60 yuan for electricity last month and 50 yuan for electricity this month. Compared with last month, what percentage was saved this month?
15, a factory completed 3/5 of the planned annual output value in the first half of the year and 60% in the second half of the year. The actual annual output value exceeds 600,000 yuan. How many million yuan is the planned annual output value?
16, master and apprentice processed a batch of parts at 5: 3. Results The master processed 1440 pieces, exceeding the task by 20%. How many pieces did the apprentice process?
17, the number of people who didn't arrive at school today in Class 1, Grade 6 is the number of people who arrived at school 1/9. What is the attendance rate of this class today?
18, Xiao Qiang read a 200-page story book and read 20% of the whole book in five days. According to this calculation, how many days did it take him to read the whole book? (Answer in different ways)
19. A train from A to B, after a certain distance, is still 2 10 kilometers away from B, so it has already traveled 20% of the whole journey. This is the ratio of the distance moved to the distance not moved, which is 3: 2. How many kilometers is it between AB and B?
20. Yucai Primary School has three classes in the sixth grade, and the number of students in the first and second classes accounts for two-thirds of the total number of students in the whole grade.
/kloc-the number of students in Class 0 and Class 3 accounts for 60% of the total number of students in the whole grade. There are 40 students in Class One, Grade Six. How many students are there in the whole grade?
2 1 350g of brine, of which 30% is salt. After adding some water, the salt content is 5%. How many grams of water?
22. A factory completed 2/7 of its annual plan in the first quarter of last year. According to this calculation, what percentage is more than planned this year?
23. A bag of flour, after using 1/3, put in 8 kg. At this time, the flour in the bag is exactly 80% of the original. How many kilograms is this bag of flour?
24. A commodity 100 yuan. First raise the price by 10%, and then lower the price by 10%. What's the current price?
25. Master Wang produced a batch of parts, and the unqualified products were119. Later, two unqualified parts were found from the qualified products. At this time, the qualified rate of products is 94%. How many qualified products are there?
26. Both cars A and B were fired from station AB at the same time. After the first meeting, the two cars continued to drive and returned immediately after arriving at bilibili and Station A.. The distance from the second meeting is 20% of AB's whole journey. It is known that car A has traveled 360 kilometers. How many kilometers are there between AB stations?
27. There are 60 willows and 40 poplars. (1), what percentage of poplar is willow? (2) What percentage of poplars are willows? (3) What percentage of willows are more than poplars? (4) What percentage is poplar less than willow?
28. Two fifths of a basket of apples is 8.4 kilograms heavier than its 15%. How many kilograms is this basket of apples?
There were 800 students in a school last year, 25% more than this year. How much less than last year?
30. After water freezes, the volume increases111. When the ice melts, how much does it decrease?
3 1. 200 yuan after a 20% discount on a commodity. What is the original price of this commodity?
32. There are three workshops, A, B and C. The number of people in Workshop A is less than that in Workshop B14, and the number of people in Workshop C is 25% more than that in Workshop B. It is known that there are 90 people in Workshop A. How many people are there in Workshop C?
33. A thread used 3/ 10 of the total length for the first time, 3 meters more than the first time, and used 20% of the total length for the third time, which was just used up. How long is this wire?
The chemical fertilizer plant produced 4.56 million tons of chemical fertilizer in the first three quarters of last year, 5% less than the annual plan. Now it wants to exceed the annual plan by 20%, so how many tens of thousands of tons will it produce in the fourth quarter?
35. The fruit shop brought three kinds of fruits. The number of baskets of oranges accounts for 40% of the total, the number of baskets of apples accounts for half of the total, and the number of baskets of pears is less than the average number of baskets of three fruits 14. How many baskets of three kinds of fruits are there?
36. A class had 35 classes on Monday, and the attendance rate was 87.5%. The day after tomorrow, another person came on leave. Do you know the attendance rate today?
37. My mother took out her two-year lump-sum savings with after-tax interest of 1778.4 yuan, with an annual interest rate of 4.68%. Interest tax is paid at 5%. Please calculate how much money my mother saved at that time.
38. Two cars, A and B, travel from A to B at the same time. When car A travels halfway, car B is 54 kilometers away from place B. When car A arrives at place B, car B travels 80% of the whole journey. What's the distance between AB sites?
39. Shopping malls hold promotional activities, and every time 600 yuan's mobile phones are sold, the profit is 30%. How much is the price reduction of this mobile phone in the promotion?
40. From 60 yuan, it is known that one of the two shirts sold in a shopping mall earned 20% and the other lost 20%. Is the conversion of two dollars a profit or a loss? What is the profit and loss?
4 1. The turnover of a hotel this month is 200,000, which is 20% less than last month. The state stipulates that 20% of hotel turnover is subject to business tax. How much business tax did the hotel pay last month?
42. From city A to city B, it takes 10 hours for car A and 8 hours for car B. If two cars leave from two cities at the same time, how many hours will they meet?
43. If you remove the percent sign of a percentage, you will get 3.564 more than the original number. What was the original percentage?
44. There are 750g of salt water with a salt content of 20%. After adding some water, the salt content is 8%. How many grams of water do you add?
45. Mix 300 grams of sugar water with 30% sugar, 200 grams of sugar water with 20% sugar, and find the sugar content after mixing?
46. My sister kept some money in the bank for three years, with an annual interest rate of 4.68% and interest tax of 20%. After the expiration, my sister * * * got back 1 123.2 yuan. How much did my sister save?
47. My sister will regularly deposit 20,000 yuan in the bank for two years. After the expiration, my sister will not only pay interest tax at 5%, but also get after-tax interest 1573.2 yuan. What is the annual interest rate for the biennium?
48. After drinking 20% of a glass of milk mixed with water and then drinking 50%, what is the percentage of pure milk in the glass?
49. The area of the great circle is 62.8 square centimeters more than that of the small circle, and the radius of the great circle is 1.5 times that of the small circle. How many square centimeters is the area of this garden?
50. Wang Mai Jr. bought a batch of toothbrushes with a wholesale price of 0.35 yuan and a retail price of 0.40 yuan. When there were 200 toothbrushes left, Xiao Wang calculated that after deducting all the costs, it was profitable. How many toothbrushes did the shopkeeper 200 yuan buy?