Більша шестірня має 36 зубців. Вона приводить у рух мен­шу, яка має 18 зубців. Скільки обертів зробить менша шестірня, коли більша зробить два оберти?

Розв'язання:
1 спосіб. Вираз (36 • 2) : 18
36 • 2 = 72 (кг) - зубців буде у русі за два оберти.
72 : 18 = 4 (об.) - обертів зробить менша шестерня.
2 спосіб. Вираз (36 : 18) • 2
36 : 18 = 2 - у два рази менше зубців має менша шестерня.
2 • 2 = 4 (об.) - обертів зробить менша шестерня.
Відповідь: 4 оберти.

1.) - 1) Поздний подростковый возраст; 2) Младший подростковый возраст

2) режим питания; личная гигиена;  наследственность;

3) Всё перечисленное.

4) Пифагор

5) 2

6)38

7)1) Холодная вода уменьшает потоотделение.

8)ЛИЧНАЯ ГИГИЕНА

9)Нижнее бельё нужно менять каждый день.; После мытья обязательно смените нательное бельё.; Обувь необходимо мыть не только снаружи, но и внутри.; В закрытой обуви необходимо постоянно гигиена волос; 3) гигиена тела; 4) гигиена спального места; 5) гигиена полости рта

Все ответы верны. Надеюсь что

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