Question

Маша заплатила 30 рублей за 2 тетради, 4 ручки и 1 карандаш. Саша заплатила 51 рубль за 4 тетради, 5 ручек и 2 карандаша. Сколько денег заплатила Даша за 2 тетради, 3 ручки и 1 карандаш? А. 23 рубля Б. 25 рублей В. 27 рублей Г 29 рублей

Answer 1

Общая стоимость: Маша и Саша= 30+51=81
За эти деньги:
2+4=6- тетр
4+5=9- ручек
1+2=3- каранд
81/3= 27
(Делим на 3, птмшт все числа выше кратны трем)
Ответ: В.27

Answer 2

Calculating the Total Cost for Each Item

To find out how much Dasha paid for 2 notebooks, 3 pens, and 1 pencil, we can first calculate the cost of each item for Masha and Sasha.

Masha paid 30 rubles for 2 notebooks, 4 pens, and 1 pencil. Sasha paid 51 rubles for 4 notebooks, 5 pens, and 2 pencils.

Let's calculate the cost of each item for Masha and Sasha.

Masha's cost per item: - Cost per notebook = 30 rubles / 2 notebooks = 15 rubles per notebook - Cost per pen = 30 rubles / 4 pens = 7.5 rubles per pen - Cost per pencil = 30 rubles / 1 pencil = 30 rubles per pencil

Sasha's cost per item: - Cost per notebook = 51 rubles / 4 notebooks = 12.75 rubles per notebook - Cost per pen = 51 rubles / 5 pens = 10.2 rubles per pen - Cost per pencil = 51 rubles / 2 pencils = 25.5 rubles per pencil

Calculating Dasha's Total Cost

Now, let's calculate how much Dasha paid for 2 notebooks, 3 pens, and 1 pencil.

Dasha's total cost: - 2 notebooks at 12.75 rubles each = 2 * 12.75 = 25.5 rubles - 3 pens at 10.2 rubles each = 3 * 10.2 = 30.6 rubles - 1 pencil at 25.5 rubles = 25.5 rubles

Adding these together: - Total cost = 25.5 (notebooks) + 30.6 (pens) + 25.5 (pencil) = 81.6 rubles

Therefore, Dasha paid 81.6 rubles for 2 notebooks, 3 pens, and 1 pencil.

So, the correct answer is 81.6 rubles.