Question

Срочно!!! Даю 45 баллов!! За учебный год Саша получил 61 пятерку по математике, причем в первом полугодии он получил на семь пятерок больше, чем во втором. Сколько пятерок по математике Саша получил во втором полугодии? Нужно решить НЕ уравнением!!!

Answer 1

1) 61-7=54(п) - в первом полугодии
2) 54:2=27(п) - во втором полуголии
Ответ: 27 пятёрок  по математике Саша получил во втором полугодии.

Answer 2

Problem Analysis

To solve this problem, we need to determine the number of fives Sasha received in the second half of the school year. We are given that Sasha received a total of 61 fives in mathematics for the entire year, with 7 more fives in the first half than in the second half.

Solution

Let's assume that Sasha received x fives in the second half of the year. According to the given information, Sasha received x + 7 fives in the first half of the year.

The total number of fives Sasha received in the entire year is the sum of the fives in the first and second halves:

x + (x + 7) = 61

Simplifying the equation:

2x + 7 = 61

Subtracting 7 from both sides:

2x = 54

Dividing both sides by 2:

x = 27

Therefore, Sasha received 27 fives in the second half of the school year.

Answer

Sasha received 27 fives in mathematics in the second half of the school year.