Question

Помогите, пожалуйста, с решением задачи. На школьном концерте присутствовали ученики первых, вторых, третьих и четвертых классов - всего 327 ребят. Первоклассников было 68, второклассников составило 3/4 числа первоклассников, а третьеклассников и четвероклассников было поровну. Сколько учеников четвертых классов было на концерте?

Answer 1

68:4*3=51 учеников 2 класса
327-68-51=208 ученики 3 и 4класса
208:2 104 учеников 4 класса
ответ : 104

Answer 2

Первый класс -68 ч
второй класс-3/4 ч
третий класс-?
четвертый класс-?
всего 372-с
68*3/4= 34*3/2=51ч -второй класс
372-(68+51)=253ч
253:2=126,5

Answer 3

Problem Analysis

We are given that there were a total of 327 students present at the school concert. The number of first-grade students was 68. The number of second-grade students was 3/4 of the number of first-grade students. The number of third-grade and fourth-grade students was the same. We need to find the number of fourth-grade students at the concert.

Solution

Let's solve this problem step by step.

1. Let's start by finding the number of second-grade students. We know that the number of second-grade students was 3/4 of the number of first-grade students. So, we can calculate the number of second-grade students as follows: - Number of second-grade students = (3/4) * Number of first-grade students

2. Next, let's find the total number of first-grade and second-grade students: - Total number of first-grade and second-grade students = Number of first-grade students + Number of second-grade students

3. Now, let's find the total number of third-grade and fourth-grade students. We know that the number of third-grade and fourth-grade students was the same. So, we can calculate the total number of third-grade and fourth-grade students as follows: - Total number of third-grade and fourth-grade students = Total number of first-grade and second-grade students

4. Finally, let's find the number of fourth-grade students. We know that the total number of third-grade and fourth-grade students is 327. So, we can calculate the number of fourth-grade students as follows: - Number of fourth-grade students = Total number of third-grade and fourth-grade students / 2

Let's calculate the values step by step.

Calculation

1. Number of second-grade students: - Number of second-grade students = (3/4) * 68 = 51

2. Total number of first-grade and second-grade students: - Total number of first-grade and second-grade students = 68 + 51 = 119

3. Total number of third-grade and fourth-grade students: - Total number of third-grade and fourth-grade students = 119

4. Number of fourth-grade students: - Number of fourth-grade students = 119 / 2 = 59

Answer

Therefore, there were 59 fourth-grade students at the school concert.

Please let me know if you need any further assistance.