Question

На уроке физкультуры второклассники построились в колонну по 3.Наташа увидела перед собой 4 ряда детей,а за собой 3 ряда.сколько учеников было на уроке физкультуры?

Answer 1

1) 4*3=12 (уч) было перед Наташей
2)3*3=9 (уч) было за Наташей
3) 12+9=21 (уч) 
Ответ: 21 ученик находился на уроке физкультуры.

Answer 2

4 X 3 = 12 впереди
3 Х 3 = 9 позади
Наташа + 2 детей рядом = 3 

Итого: 12+9+3 = 24 человека 

Answer 3

Calculating the Number of Students in Physical Education Class

To calculate the number of students in the physical education class, we can use the information provided about the formation of the students in columns.

Given: - Second graders formed a column of 3 students each. - Natasha saw 4 rows of students in front of her and 3 rows behind her.

Calculation

1. Rows in Front of Natasha: - Since Natasha saw 4 rows of students in front of her, the total number of students in front of her = 4 rows * 3 students/row = 12 students.

2. Rows Behind Natasha: - Natasha saw 3 rows of students behind her, so the total number of students behind her = 3 rows * 3 students/row = 9 students.

3. Total Number of Students: - Total number of students in the class = Students in front + Students behind + Natasha herself = 12 + 9 + 3 = 24 students.

Therefore, there were 24 students in the physical education class.