Question

В школе годовую контрольную работу по математике писали 180 шестиклассников. Отметки«4» или«5» получили 45% всех шестиклассников. Сколько шестиклассников получили отметку ниже«4»?

Answer 1

180 учеников=100% т.е. 1%=180/100=1,8
ниже 4-ёх написали 100%-45%=55%. Найдём кол-во учеников, написавших на отметку ниже 4-ёх.
55%*1%=55%*1,8=99 учеников
Ответ: 99 учеников

Answer 2

Calculation of the Number of Students Who Received a Mark Below "4"

To calculate the number of sixth graders who received a mark below "4," we can use the information provided.

Given: - Total number of sixth graders who took the annual exam: 180 - Percentage of students who received marks "4" or "5": 45%

We can calculate the number of students who received a mark below "4" using the following steps:

1. Calculate the number of students who received marks "4" or "5": - 45% of 180 = 0.45 * 180 = 81

2. Calculate the number of students who received a mark below "4": - Total students - Students with marks "4" or "5" = 180 - 81 = 99

Therefore, 99 sixth graders received a mark below "4".