Question

На строительство привезли 126 т цемента, а песка - в 4 раза больше.За день израсходовали а тонн песка. Сколько тонн песка осталось. Составь выражение для решения задачи и найди его его значение, если а = 450........)

Answer 1

126* 4 =504 т песка
504 - 450 =54 тонны песка осталось

Answer 2

(126* 4)-450=54(тонны.) песка осталось.

Answer 3

Problem Statement

На строительство привезли 126 т цемента, а песка - в 4 раза больше. За день израсходовали а тонн песка. Сколько тонн песка осталось? Составь выражение для решения задачи и найди его значение, если а = 450.

Solution

To solve this problem, we need to determine the amount of sand that is left after using a tons of sand in a day.

Given: - The amount of cement brought for construction is 126 tons. - The amount of sand brought is 4 times more than the amount of cement. - The amount of sand used in a day is a tons.

To find the amount of sand left, we can subtract the amount of sand used from the total amount of sand brought.

Let's denote the amount of sand brought as s and the amount of sand used as a.

We know that the amount of sand brought is 4 times more than the amount of cement, so we can express it as:

s = 4 * 126

Now, to find the amount of sand left, we subtract the amount of sand used from the total amount of sand brought:

sand_left = s - a

Substituting the value of s and a:

sand_left = (4 * 126) - a

Now, we can substitute the value of a as 450:

sand_left = (4 * 126) - 450

To find the value of sand_left, we can calculate the expression:

sand_left = (4 * 126) - 450 = 504 - 450 = 54

Therefore, there are 54 tons of sand left.

Answer

The amount of sand left is 54 tons.