Question

Задача 4 класса.В зоопарке живут крокодилы и страусы.В сумме у них 40 голов и 94 ноги.Сколько в зоопарке крокодилов и страусов?Пожалуйста с объяснениями подробно,чтобы было понятно.

Answer 1

40*2=80 (ног) если у каждого по 2 ноги
94-80=14 (ног) лишние
14:2=7 крокодилов
40-7=33 страуса
Ответ 7 крокодилов, 33 страуса

Answer 2

Problem Analysis

We are given that there are crocodiles and ostriches in a zoo. The total number of heads is 40, and the total number of legs is 94. We need to determine the number of crocodiles and ostriches in the zoo.

Let's assume that the number of crocodiles is represented by 'C' and the number of ostriches is represented by 'O'.

Solution

To solve this problem, we can set up a system of equations based on the given information.

1. The total number of heads: C + O = 402. The total number of legs: 4C + 2O = 94 We can solve this system of equations to find the values of 'C' and 'O'.

Solving the System of Equations

We can solve the system of equations using various methods, such as substitution or elimination. Let's use the elimination method.

Multiplying equation 1 by 2, we get: 2C + 2O = 80

Subtracting equation 2 from this new equation, we get: 2C + 2O - (4C + 2O) = 80 - 94 -2C = -14 C = 7

Substituting the value of C into equation 1, we get: 7 + O = 40 O = 40 - 7 O = 33

Answer

Therefore, there are 7 crocodiles and 33 ostriches in the zoo.

Explanation

The given problem can be solved by setting up a system of equations based on the number of heads and legs. By solving these equations, we find that there are 7 crocodiles and 33 ostriches in the zoo.