Question

За 5 тетрадей заплатили n коп., а за 11 блокнотов - на m коп. больше. На сколько копеек блокнот дешевле тетради? Надо составить БУКВЕННОЕ ВЫРАЖЕНИЕ и найти его значение при n=1000, m=320.

Answer 1

N : 5  -  (n - m) : 11

1000 : 5 - (1000 - 320) :  11
200 - 680 : 11

Тут не делится. Может m = 340???, тогда блокнот стоит 60 руб и разница = 140 руб

Answer 2

N : 5 - (n+m) :11 ; 1000 : 5 - ( 1000+320 ): 11 = 200 - 120 = 80

Answer 3

Problem Analysis

We are given that 5 notebooks cost n kopeks and 11 notepads cost m kopeks more than the notebooks. We need to find the difference in price between a notebook and a notepad in kopeks. To solve this problem, we can set up an equation using the given information and substitute the values of n and m to find the answer.

Mathematical Expression

Let's represent the price of a notebook in kopeks as x. According to the given information, the price of 5 notebooks is n kopeks, and the price of 11 notepads is (x + m) kopeks. We can set up the following equation:

5x = (x + m) + n

Solving the Equation

To find the value of x, we can solve the equation for x using the given values of n and m.

5x = x + m + n

Simplifying the equation:

4x = m + n

Dividing both sides by 4:

x = (m + n) / 4

Substituting the Values

Now, we can substitute the given values of n = 1000 and m = 320 into the equation to find the value of x.

x = (320 + 1000) / 4 x = 1320 / 4 x = 330

Answer

Therefore, a notebook is cheaper than a notepad by 330 kopeks.

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