![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
There are 27 RMB with face value of 2 yuan and 5 yuan, totaling 99 yuan. How many RMB with face value of 2 yuan and 5 yuan?
Assuming that all the RMB with a face value of 2 yuan, then 27 RMB pieces are: 2 × 27 = 54 (yuan), compared with the actual amount of money reduced: 99-54 = 45 (yuan), each RMB piece with a face value of 2 yuan is less than a RMB piece with a face value of 5 yuan: 5-2 = 3 (yuan). Therefore, RMB pieces with a face value of 5 yuan are: 45 △ 3 = 15 (yuan), and RMB pieces with a face value of 2 yuan are: 27-15 = 12 (yuan)（ A: there are 12 RMB with a face value of 2 yuan and 15 RMB with a face value of 5 yuan
There are eight one yuan coins, x two yuan notes and Y five yuan notes in Xiaoli's Bank. There is at least one note of each type. The total is 26 yuan
2X + 5Y = 18, that is, 5Y = 18-2x, because the 2x is even, so 18-2 · x is even. To make 18-2x divisible by 5, the bits of this number can only be 0, so 18-2x = 10, we get x = 4, y = 2
There are eight one yuan coins, x two yuan notes and Y five yuan notes in Xiaoli's Bank. There is at least one note of each type. The total is 26 yuan
(set of equations)
Series of equations
The product of 26-8x1 = 18 2x + 5Y = 18 5Y must be a sum, not greater than 18, and can only be 2 2x5 = 10 18-10 = 8 2x = 8 x = 4
+
The school bought 5 cases of coke for solving equations in Grade 5 of primary school, 24 bottles in each case, drank some, and how many bottles did the remaining 38 bottles drink?
Drink: 5 × 24-38 = 82 bottles
There is a coke and a sprite
Now pour a full cup of coke out of the coke bottle and completely pour it into the sprite bottle. Then pour a full cup of mixture out of the sprite bottle and completely pour it into the coke bottle. This way, one out and one in can be repeated ten times. Q: is there more sprite in the coke bottle or more cola in the sprite bottle? Why?
As many. Say simple point, do not believe you try. Suggest you think about it, very simple
There are 160 cases of milk and coke in the supermarket. The number of cases of coke is three times that of milk
Set X boxes for milk
3x+x=160
4x=160
x=40
A: 40 cases
In a supermarket, a can of coke is 0.5 yuan more expensive than a bottle of fruit milk. Xiaoming takes 20 yuan to buy a bottle of fruit milk and 4 cans of coke to get 3 yuan back, so how much is a can of coke and a bottle of fruit milk
Xiao Ming bought one tin of fruit milk and four tins of coke for 20 yuan, and got back 3 yuan. One tin of coke is 0.5 more than one tin of fruit milk. Let the fruit milk be X. equation: x + 4 (x + 0.5) + 3 = 20. The solution is x = 3
Why is milk sold in square boxes and coke sold in round bottles?
Almost all soft drink bottles, whether they are glass bottles or aluminum cans, are cylindrical. However, milk boxes seem to be square. Square containers can make more economical use of shelf space than cylindrical containers. So, why do soft drink manufacturers insist on using cylindrical containers? One of the reasons may be that most soft drinks are
Why is coke bottle round and milk bottle square?
This is the reason for designing products. There are also square cokes
RELATED INFORMATIONS
- 1. The quantity ratio of cola to sprite in cold drink shop is 3:4, sprite is 60 cases, so Cola is? Case
- 2. In midsummer, 10 students went to the cold drink shop and handed over the beverage statistics they needed to the waiter: Six wanted coke, five wanted sprite, Five people want juice, three people want Coke and Sprite, two people want sprite and juice, and one person wants all three. Q: how many people have drinks and drinks? (three situations.)
- 3. If you drink 50% of a box of drinks, there are 18 bottles left. If you drink 6 bottles, how many bottles are left?
- 4. There are 12 bottles of drinks, 11 of which are of the same quality, and another one is heavier. How many times can we guarantee to find out the heavier one?
- 5. There are 7 bottles of pop-up beverage, one of which is less in quality. If you weigh it with a balance at least several times, you can find the bottle with less in quality
- 6. In order to expand sales and increase profits, the supermarket is prepared to reduce the price appropriately. According to the calculation, if the price of each box is reduced by 1 yuan, 2 more boxes can be sold every day. (1) if you want to make a profit of 14000 yuan per day, how much should you reduce the price of each box? (2) How much is the price reduction per case? Is the supermarket making the biggest profit every day? What is the maximum profit?
- 7. A supermarket bought 240 bottles of coke. One third of the drinks were sold on the first day, and one fourth of the total drinks were sold on the second day. How many of them are still unsold?
- 8. Class A and class B of grade 9 in Guangming Middle school donated the same amount of money for "Hope Project", both of which were more than 300 yuan and less than 400 yuan. It is known that one person in class a donated 6 yuan, and the others donated 9 yuan; one person in class B donated 13 yuan, and the others donated 8 yuan. What is the total number of students in class A and class B?
- 9. There is a kind of drink bottle with a cylindrical body (excluding the bottle neck) and a volume of 300 cubic centimeters. Now there are some drinks in the bottle, which are placed at the height of the drink There is a kind of beverage bottle with a cylindrical body (excluding the bottle neck) and a volume of 480 ml. now there are some drinks in the bottle. The height of the drink is 20 cm when it is placed upright, and the height of the rest is 4 cm when it is placed upside down. How many cubic centimeters of drinks are there in the bottle?
- 10. Five empty bottles can be exchanged for one bottle of soda. A class of students drank 161 bottles of soda, some of which were exchanged with the remaining empty bottles, so they should at least buy soda
- 11. According to the regulations of the cold drink shop, four empty bottles can be exchanged for one bottle of soda after drinking. There are 29 students in class 2 (1). How many bottles of soda does the monitor need to buy to drink one bottle of soda for each student?
- 12. The density of the drink is 950kg / m3, the weight of the ice is 0.9kg, the weight of the ice is 20g, the area of the bottom of the cup is 50m2, the depth of the drink is 10cm, what is the buoyancy of the ice The density of the drink is 950kg / m3, the mass of the ice is 0.9kg, the mass of the ice is 20g, the area of the bottom of the cup is 50m2, the depth of the drink is 10cm, what is the buoyancy of the ice? What is the total pressure of the drink and the ice on the bottom of the cup? G = 10N / kg, pay attention to the unit conversion
- 13. The supermarket sold 24 kinds of a drinks and 36 kinds of B drinks today. The simplest integer ratio of a drinks is () and the ratio is () to sell
- 14. A kind of beverage has two packaging specifications. The capacity of large bottle is 1.5 liters, which is three times of that of small bottle. The unit price of small bottle is 1.8 yuan, which is 3.2 yuan cheaper than that of large bottle Which kind of packing is more suitable? How many bottles do you want? How many lines do you need?
- 15. A fraction is multiplied by 23 and 47 respectively. The sum of the two products is 1314. The fraction is______ ．
- 16. Write the following function expression, and point out the constant and variable, independent variable and function The relationship between circle area s and diameter D
- 17. If the unit price of a newspaper is a yuan per copy and X is the number of copies of the newspaper, then the relationship between the total price of the newspaper y (yuan) and X is () () independent variable
- 18. Send each letter 0.6 yuan, there are n letters need y yuan to list the function relationship, find the range of independent variable n is equal to 0
- 19. It's 2.6 yuan per box of milk. The store promotes sales. If you buy five boxes, you get one free. How much does it cost to buy 30 boxes of milk?
- 20. The unit price of milk in the shop is 2.6 yuan per box. The shop has a sales promotion on New Year's day. If you buy five boxes, you get one free. How much does it cost to buy 30 boxes of milk at least?