Предмет: Математика, автор: 0458297

Мотоцикліст подолав 153 км за дві години. За другу годину він подолав 5/9 цієї відстані. На скільки меньше кілометрів мотоцикліст подолав за першу годину, ніж за другу?

Ответы

Автор ответа: ildar502020
3

Ответ:  17 км.

Пошаговое объяснение:

Мотоциклист преодолел 153 км за два часа.

За второй час он преодолел 5/9 этого расстояния.

На сколько меньше километров мотоциклист преодолел за первый час, чем за второй?

-------------------

Находим 5/9 от 153 =>  153*5/9 = 85 км преодолел за  второй час. Тогда за 1 час он преодолел 153 - 85=68 км.

На 85-68=17  меньше км мотоцикліст подолав за першу годину, ніж за другу.

2 способ.

1-5/9=4/9 пути он преодолел за 1 час

5/9-4/9=1/9;

На 153*1/9=17 меньше км мотоцикліст подолав за першу годину, ніж за другу.

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