Question

за тетради по цене 8грн каждая заплатили 48грн,а за одинаковые карандаши заплатили 18грн.какова цена одного карандаша,если карандашей купили столько же,сколько тетрадей.составить 3 обратные задачи с таблицей.​

Answer 1

Ответ:

Сначала узнаем, сколько всего было тетрадей

48 грн за все тетради, а одна - 8 грн

1) 48:8 = 6 (шт.) - кол-во тетрадей

Карандашей столько же, сколько и тетрадей, значит:

2) 18:6 = 3 (грн) - за 1 карандаш

Пошаговое объяснение:

48/8 = 6

18/6= 3грн.

Ответ:3 грн. Один карандаш

Answer 2

Problem Statement

A group of people bought notebooks for 8 UAH each and paid a total of 48 UAH. They also bought an equal number of pencils and paid a total of 18 UAH for them. We need to find the price of one pencil and determine how many pencils were bought, assuming they bought the same number of pencils as notebooks.

Solution

Let's assume that the number of notebooks and pencils bought is 'x'.

According to the given information, the total cost of notebooks is 48 UAH, and each notebook costs 8 UAH. Therefore, we can write the equation:

Total cost of notebooks = Price per notebook × Number of notebooks 48 UAH = 8 UAH × x

Simplifying the equation, we find: x = 48 UAH / 8 UAH x = 6

So, they bought 6 notebooks and 6 pencils.

Now, we need to find the price of one pencil. The total cost of pencils is 18 UAH, and the number of pencils is also 6. Therefore, we can write the equation:

Total cost of pencils = Price per pencil × Number of pencils 18 UAH = Price per pencil × 6

Simplifying the equation, we find: Price per pencil = 18 UAH / 6 Price per pencil = 3 UAH

Therefore, the price of one pencil is 3 UAH.

Reverse Problems with Table

1. Problem: A group of people bought 4 notebooks and 4 pencils. They paid a total of 32 UAH for the notebooks and a total of 12 UAH for the pencils. We need to find the price of one notebook.

| Item | Price per Item | Number of Items | Total Cost | |------------|----------------|-----------------|-------------| | Notebooks | ? | 4 | 32 UAH | | Pencils | 2 UAH | 4 | 12 UAH |

Solution: Using the same approach as before, we can find that the price of one notebook is 8 UAH.

2. Problem: A group of people bought 10 notebooks and 10 pencils. They paid a total of 80 UAH for the notebooks and a total of 30 UAH for the pencils. We need to find the price of one pencil.

| Item | Price per Item | Number of Items | Total Cost | |------------|----------------|-----------------|-------------| | Notebooks | 8 UAH | 10 | 80 UAH | | Pencils | ? | 10 | 30 UAH |

Solution: Using the same approach as before, we can find that the price of one pencil is 3 UAH.

3. Problem: A group of people bought 7 notebooks and 7 pencils. They paid a total of 56 UAH for the notebooks and a total of 21 UAH for the pencils. We need to find the price of one notebook.

| Item | Price per Item | Number of Items | Total Cost | |------------|----------------|-----------------|-------------| | Notebooks | ? | 7 | 56 UAH | | Pencils | 3 UAH | 7 | 21 UAH |

Solution: Using the same approach as before, we can find that the price of one notebook is 8 UAH.

Please let me know if you need any further assistance!