A piece of clothing is 200 yuan. First raise the price by 1 / 5, then lower the price by 1 / 5. How much is the current price?

200 * (1 + 1 / 5) * (1-1 / 5) = 192 yuan

During the Spring Festival, in order to promote sales, all goods are sold at a 25% discount, which means 75% of what is

The discount is 75% of the original price

During the new year's day of 2011, Eurasian merchants all carry out shopping promotion activities: those who purchase more than 2000 yuan can enjoy 75% discount
Li Yun's family wants to buy a 1900 yuan range hood, and Zhang Hong's family wants to buy a 1500 yuan silk quilt
How much does it cost to buy the two families together

850 (1900+1500)*75%=2550 1900+1500-2550=850

3600 yuan for a mobile phone, 15% off for a mall, 100 yuan off for B mall, and so on. Where can I buy it

Of course, shopping mall B is more cost-effective. Shopping mall a: 3600 * 0.85 = 3060, shopping mall B: 3600-100 * 7 = 2900

For math problems, a mobile phone costs 3600 yuan, 15% off for a mall, 100 yuan off for B mall, and so on,

Shopping mall a: preferential price = 3600 × 85% = 3060 yuan; shopping mall B: 3600 ／ 500 = more than 7, 100 yuan; preferential price = 3600-7 × 100 = 2900 yuan. So: shopping mall B is cheap. ~ 523 will always answer for you. I wish you progress in your study ~ ~ ~ if you agree with my answer, please click the [select as satisfactory answer] button in time ~ ~ mobile phone questions

First grade mathematics, add 200
Do as much as you can
one
2. Given that there are two points a and B on the number axis, and ab = 1, the distance between a and origin 0 is 3, find the sum of the distances between all qualified B and origin 0
3. Given a + B + C = O, ABC ≠ 0, find the absolute value of a divided by the absolute value of a + B divided by the absolute value of B + C divided by the absolute value of C
4. Known a

I didn't see the title
2 B1 = 1 / 3 B2 = - 1 / 3, so the sum of distances = 2 / 3
The absolute value of a + B is the absolute value of C. The absolute value of B + C is the absolute value of A. the original formula is equal to 1
4 |a-b|+|a+b|-|c-a|+2|b-C|=b-a+a+b-c+a+2c-2b=a+2c
One is m > 0, then 5m = 30 m = 6, the other is MB > 0, then | a | > | B|
In case 2 a > 0 > - a > b, then | B | > | a|
In case 3 a > 0 > b > - A, then | a | > | B|
Give me points when you're done

Xiao Ming went to the stationery store to buy 2B pencils. The owner said, "if you buy more, you'll get a 20% discount." Xiao Ming calculated that if you buy 50 pencils, it's 6 yuan cheaper than the original price. Then how much is the original price of each pencil?

Suppose that the original price of each pencil is x yuan, according to the meaning of the question: 50x (1-0.8) = 6, the solution is: x = 0.6. Answer: the original price of each pencil is 0.6 yuan

1. If x satisfies the algebraic formula 2x + 5 and is not less than the algebraic formula 4x-1, it is a positive integer___ .
2. If | 5-10x | = 10x-5, then the value range of X is_ .
3. It is known that (the square of 2k-1) > 0 of 3k-2x is an inequality of one degree with respect to x, then K=_ The solution set of this inequality is .
6. The fruit shop bought a ton of certain fruit, the purchase price is 7 yuan / kg, and the selling price is 11 yuan / kg. After half of the sales, it is ready to sell at a discount. If the total profit is not less than 3450 yuan, the remaining fruit can be sold at the original price They are sold at a discount

(1) If the solution set X is less than or equal to 3, then the positive integer solution set is 1,2,3 (2). After the absolute value sign is removed, the algebraic expression changes sign, which shows that 5-10x is less than 0, so x is greater than or equal to 1 / 2 (3). To make the inequality a unary linear inequality, 2k-1 = 1 must be satisfied, so k = 1. The solution set of the original inequality is x less than 3 / 2 (6)

If the fifth power of the square of 3 * n-2 * 10 * N and the square of X * y * n-6 is a quintic polynomial of x.y, then the coefficient of the quadratic term is The coefficient of the highest order term is .

3,
-2*10

If X-Y = 3, xy = 1, then the square of (x + y)=_______
【S40】

(x-y)^2=x^2-2xy+y^2=9
x^2+2xy+y^2=9+4=13
(x+y)^2=13

A piece of clothing is 200 yuan. First raise the price by 1 / 5, then lower the price by 1 / 5. How much is the current price?