2. A company charges 390 yuan for selling goods and 290 yuan for shopping on behalf of customers. A customer wants to buy and sell goods, and the company deducts the service fee of 264 yuan, so the customer just breaks even. How much did you spend on shopping?
3. Canadian and A cars leave from A and B, respectively, in opposite directions. At the time of departure, the speed ratio of A and B is 5: 4. After meeting, the speed of A decreased by 20%, and the speed of B increased by 20%. When A arrives at B, B is still 65,438+00 kilometers away from A. Find the distance from A to B..
4. 2/5 of Lao Wang's weight is equal to 2/3 of Fu Xiao's, and 3/7 of Lao Wang is lighter than 3/4 of Fu Xiao's 1.5. How many kilograms does Lao Wang and Fu Xiao weigh each?
5. A school wrote 159 letters in the sixth grade, which was 6% more than that in the fifth grade. The fourth grade wrote 5/6 of the fifth grade. How many letters did you write in the fourth grade? How many letters did you write in fifth grade?
6. In one shop, Xiao Ming spent 2/3 of the money, in another shop, he spent the rest 1/4, leaving 4 yuan. He asked Xiao Ming how much money he had.
7, a bottle of water, pour out 1/2, then pour in the same amount of alcohol, then pour out the solution of 1/3, then pour out 1/4, and then fill up with alcohol. )%。
8. The school planted 3/8 trees on the first day, the remaining 2/3 on the second day and 55 trees on the third day. The result exceeds the planned 1/4. How many trees were planned to be planted?
9. A school is going to send110 and 6 books to Qingshan Primary School, and the rest to Children's Palace. The number of books sent to Children's Palace is three times more than that sent to Qingshan Primary School. Of the remaining 75% of the second batch, 80 books were sent to Miao Kindergarten, leaving 300 books. How many books are there in the school?
10, two containers, one with a glass of water and the other empty. Pour the water from A to B 1/2 for the first time, 1/3 for the second time, 1/4 for the third time ... How much water is there in A after this 10 1 time?
1 1,1000kg of fruits with 99% moisture content are delivered from the warehouse. After a week, it was found that the water content was reduced to 98%. What is the total weight of this batch of fruit now?
12, a basket of peaches, take half of the total for the first time and the remaining half for the second time. There is one left. How many peaches are there?
13, a piece of land, cultivated on the first day is 2 mu more than 1 3 of this land, and cultivated on the second day is less than the remaining 1/2, leaving 38 mu. How many acres of this land is * *?
14, two barrels, 60kg of sugar water in barrel A, 4% sugar content, 40kg of sugar water in barrel B, 20% sugar content. What is the sugar content in each barrel after two barrels are changed into 24 Jin?
15, four chicken farms * * * raised 654.38+million chickens, of which farm A raised 20,000 more chickens than farm B, and farm C was farm D15. How many chickens were raised in each of the four farms?
16, someone dug a canal. On the first day, 30% of the total length was dug, and on the second day, 8/9 of the total length was dug, and it was all dug in three days. It is known that the third one dug 75 meters more than the second one, so what is the total length of the canal?
17, Xiao Wang has no more than 50 books, of which 1/7 is reading, 1/3 is work, and 1/2 is teaching material. How many books does Xiao Wang have?
18. Two cups with the same size, one containing half a cup of alcohol and the other half a cup of water, pour part of the alcohol in the first cup into the second cup, and then pour the mixed liquid with the same volume from the second cup into the first cup. Is this the volume of water in the first cup and alcohol in the second cup? ? ? ? ? ? . (Who is older)
19. For a batch of parts, A processed 20%, B processed the remaining 25%, C processed the remaining 40%, and there were 3,600 pieces left. How many pieces are processed by B, C and * *?
20.A, B and C have the following relations: 2/3 of A is 4/7 of B, 2/3 of B is 4/7 of C, and C is more than A 13, so what is B?
2 1, a pair of watermelons, sold 1/4 and 6 on the first day, left 1/3 and 4 on the second day, and left 1/2 and 3 on the third day, just sold out. How many melons are there in this pile?
22, a batch of fruit, the first day batch of 2/9, the second day batch of remaining 3/7, the third day into some, the number is half of the remaining after the second day batch method; At this time, * * * has 298 kilograms, so how many kilograms of fruit?
23. Put 25g of salt into100g of water. What is the concentration of salt water?
24. An egg seller sold half an egg for the first time, half an egg for the second time, and there was one left. How many eggs did she ask?
Last year, the water fee of a factory increased by 5% compared with the previous year, and this year it decreased by 5% compared with last year. Compared with the year before last, what is the percentage of water fee this year?
If a commodity is sold at a fixed price, it will make a profit. If you sell it at 80% of the fixed price, you will lose 832 yuan. What is the purchase price of the goods?
27. Among the four kinds of flowers, peony accounts for 2/ 15 of the total number of other three kinds of flowers, peony accounts for15 of the total number of other three kinds of flowers, and red rope accounts for 4/ 15 of the total number of other three kinds of flowers. There are 60 kinds of known roses, so how many are red rope flowers?
28. Party A has 65,438+06 liters of orange juice and Party B has 24 liters of water. How to make the orange juice content of container A 60% and container B 20%? How many liters of solution do A and B have?
29. There are two boxes A and B. It is known that 4/9 of box A is black, 5/8 of box B is white, and the total number of pieces in box A is 916 of the total number of pieces in box B. What is the total number of white pieces in two boxes?
30. A person withdrew more than half of his deposit in 5 yuan for the first time, and the remaining half withdrew more than 10 for the second time, leaving 125 yuan. How much money does he have?
3 1,15g salt is put into135g water. After standing for a period of time, the weight of brine becomes120g. What is the concentration of salt water at this time?
32. There are four urban areas, in which A is 4/ 13 of the city, B is 5/6 of A, C is 4/ 1 1 of A and B, and D has 4,000 more people than C. How many people are there in the city?
33, a warehouse shipped five times, the first shipment was half, the second shipment was half, and the third and fourth shipments were half of the last shipment. After the fifth shipment, the rest was distributed to three factories, A, B and C. A got 1/3, B got 1/2, and C got 8 tons, which was just finished.
34. There is a kind of wine with 4.2 yuan per kilogram, 4.8 yuan per kilogram and 7.8 yuan per kilogram. At present, the mixed price of three kinds of wine is 6 yuan per kilogram, so what is the ratio of (1) A, B and C? : ? : ? . (2) If the mixture is 105 kg, how much kg should each of the three wines take?
35. How many grams of water can be added to sugar water with a concentration of 10% and a weight of 80 grams to get sugar water with a concentration of 8%?
36. Among the three kinds of balloons, the red one accounts for 1/3 of the total, the yellow one has three more than the non-red one, and the rest are all green. Knowing that the red one is 24 less than the green one, how many are yellow?
37. One side of a square is reduced by 30%, and the other side is increased by 3 meters to get a rectangle, which is equal to the area of the original square. Find the area of this square.
38. Profit percentage =? ? Buying price? ? ? ? ?
Last year, a store sold clothes at a price of 85%, with a profit of 25%, but this year, because of the low purchase price, it can get a profit of 30% by selling clothes at a price of 75%. So, what is the ratio of this year's purchase price to last year's?
39. There are several people in a factory, of which 1/5 is party member, 12/3 is a league member, and there are 88 people. How many people are there in this factory?
40. The fifth and sixth grades are ***3 10. It is known that 3/8 of the sixth grade is equal to 3/5 of the fifth grade. How many people are there in the fifth grade?
4 1, it takes 2/3 distance for someone to go from A to B by train and1/3 by bus; It takes the same time to come back by car as by cart, and it takes five hours less to come back than to go. It is known that the cart travels 24 kilometers per hour and the car travels 72 kilometers per hour. How far is the distance between a and b?
42. Xiao Ming scored no less than 90 points in all subjects (full score 100). It is known that geography is 5/6 of mathematics and Chinese is geography 1. A foreign language is higher than a Chinese language by 10, so what is the math score?
43. When three people buy a car, the money paid by both parties is 65438+ 0.4 of the total amount paid by the other two people. If Party A and Party B each pay 30,000 yuan, then Party C pays 6,000 yuan less than Party B ... How much is this car?
44. For a batch of parts, A planned to make 50 more than B, but as a result, B actually made 70 less than planned. The total number of parts he made was 10, which was 3/5 more than B actually made. How many parts are there in this batch?
45, 30 pieces of sugar, the younger brother grabbed a handful first, and the older brother saw that the younger brother shared too much, and caught half. The younger brother refused to accept it and asked his brother for half. My brother didn't agree, so my brother gave him 7 yuan. At this time, my brother has two more pieces than my brother. How many pieces did the younger brother catch at first?
46. Three people buy things together, and A pays 1/2 exactly what B pays 1/3, which is exactly 2/7 of what C pays. It is known that C pays 120 yuan more than A, so how much does a * * * pay?
47, a car from A to B, if the speed is increased by 20%, it can arrive 1 hour earlier than before, and if the speed is increased by 25% after driving at the original speed120km, it can arrive 40 minutes earlier. How many kilometers are the two places apart?
48. Order a batch of paper 120 copies, and the remaining paper is 40% of this batch of paper. If you order 185 copies, there are still 1350 copies left. How many sheets of paper are there in this batch?
49, a basket of three kinds of vegetables, 5/7 tomatoes and 1/3 * * cucumbers weigh 32kg, 3/4 tomatoes and 3/5 potatoes weigh 31kg; 7/9 of cucumber and 4/5 of potato weigh 48kg. How much do these three vegetables weigh?
50. A group of lawn mowers cut grass in two fields, the big one is twice as big as the small one. In the morning, all the people cut the grass on a big grass, in the afternoon, half of them stay on the big grass and cut the grass at night; The other half went to mow the grass, and there was one piece left at night, which happened to be cut by one person in one day. How many lawn mowers are there in this group?
5 1, a bunch of balls, red and yellow. First count 49 red balls out of 50, then count 7 red balls out of every 8 until the last 8, which is just the end; If there are no less than 90% red balls in the known number of balls, how many balls can there be in this pile at most?
52. A batch of rice was delivered from the canteen, and 60 kilograms was eaten every day. After 5 days, 2/5 of the rice was left. How many Jin of rice was transported in the canteen?
53. When an expressway is completed, the total length 1/5 is less than 14 meters on the first day, and the total length 1/8 is more than 5 meters on the second day, leaving 63 meters. How long is this road?
54. For a book, Xiao Qiang read 12% on the first day, 13% on the second day, and read 20 pages in two days. How many pages are there in this book?
55. The weight of a bottle of wine is equivalent to 1/20 of alcohol, and the weight of the package is equivalent to 1/30 of alcohol. It is known that this bottle of wine weighs 39 grams. What's the weight of alcohol and bottles?
56, a batch of coal, the first day shipped all 3/8, loaded with 5 cars and 5 tons, shipped the rest, and just loaded with 14 cars, how many tons of coal * * *?
Xiao Ming finished reading a book in three weeks. In the first week, he read 25% of the book, in the second week, he read the remaining 40%, and in the third week, he read 54 pages more than in the second week. How many pages did Xiao Ming read in the first week?
58. A batch of cement was transported for 2/5 for the first time,13 for the second time, 3/4 for the third time and 15 ton for the rest. How many tons is this batch of cement?
59. An expressway was completed in three months. In the first month, 25% of the total length was repaired, and in the second month, 40% of the total length was repaired, 3 kilometers more than in the first month. How many kilometers were built in the third month?
60. Two bags of rice, the first bag is less than the second bag 18kg. If you pour 6kg from the first bag to the second bag, it means that the rice in the first bag is 5/8 of that in the second bag. How many kilograms were there in these two bags of rice?
6 1, a bottle of drink, drank half for the first time, and the bottle weighed 700g. If you drink13, the bottle weighs 800 grams. Find the weight of the bottle.
62. For a barrel of oil, more than half 1 kg was used on the first day, the remaining half was used for more than 2 kg on the second day, and the remaining half was used for more than 3 kg on the third day. Finally, there were 2 kg left in the barrel. How many kg of oil was there in the barrel?
63. I have finished reading a book on page 130, and I plan to read the rest in eight days. If I read the same number of pages every day, then the number of pages I read in three days is exactly 5/22 of the whole book. How many pages are there in this book?
64, 150 apple, kindergarten big class gets 1/3, small class gets 1/2. Assuming that 150 apples are all distributed to the big class and the small class, how many apples are distributed to these two classes?
65. Students in Class A and Class B 144, 62.5% in Class A and 75% in Class B 100. How many students are there in each class?
66. The two classes are divided into a batch of saplings. One class gets more than 30% of 100 trees, while the other class gets less than 60% of 50 trees. How many saplings are there?
67. A batch of spare parts was originally planned to be distributed to the master and apprentice at a ratio of 5: 3. Now the master processes 1200 pieces, which exceeds 20% of the assigned tasks, while the apprentice only completed 60% of the original tasks due to illness. How many pieces did the apprentice actually process?
68. A highway will be built in 0/2 days. Now Team A needs to repair for 3 days, then Team B needs to repair for 2 days, leaving 4/5 of the road unfinished. It is known that Team A repairs 4 meters less than Party B every day. How long is this road?
69. Party A and Party B go in opposite directions, meet four hours later, and then move on. After another 3 hours, A arrives at B, and B is 70 meters away from A. How many kilometers is there between A and B?
70. There are 90 students in two classes, including 7 1 young pioneers. It is known that Class One Young Pioneers account for 75% of the class and Class Two Young Pioneers account for 5/6 of the class. How many students are there in each class?
7 1, a batch of parts, Xiao Zhang made all 12.5% on the first day, 25% more on the second day, and 8 more on the third day. At this point, half of all parts have been completed. How many parts are there in this batch?