Question

1. Найти неверное неравенство:410 кг < 40 ц 5кг416сек > 4мин20сек3070см >3 м70см35 кв.см < 3 кв.дм.2.За диктант класс из 32 человек получил четверки пятерки. На каждые три пятерки приходится пять четверок. Сколько 4 и сколько 5 получили ученики этого класса?

Answer 1

1) последнее неравенство не верно

Answer 2

Incorrect Inequality:

The incorrect inequality in the given options is 35 кв.см < 3 кв.дм. This is incorrect because 1 кв.дм is equal to 100 кв.см, so 3 кв.дм is equal to 300 кв.см. Therefore, the correct inequality should be 35 кв.см > 3 кв.дм.

Calculation of Grades:

To calculate the number of students who received a grade of 4 and 5, we need to use the given information that for every three students who received a grade of 5, there are five students who received a grade of 4.

Let's assume that the number of students who received a grade of 5 is x. According to the given information, the number of students who received a grade of 4 is (5/3)x.

We know that the total number of students in the class is 32. So we can set up the following equation:

x + (5/3)x = 32

To solve this equation, we can multiply both sides by 3 to get rid of the fraction:

3x + 5x = 96

Combining like terms:

8x = 96

Dividing both sides by 8:

x = 12

Therefore, the number of students who received a grade of 5 is 12, and the number of students who received a grade of 4 is (5/3) * 12 = 20.

So, 20 students received a grade of 4, and 12 students received a grade of 5.