Предмет: Математика, автор: tukenElnur

Помогите решить эти 2 примера пж

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Ответы

Автор ответа: zinovicgrigorij

Ответ: 1 2/3; 8км.

Пошаговое объяснение:

3 5/6а-2 1/3а=3 5/6а- 2 2/6а=1 3/6а=1 1/2а

1 1/2*2/3=5/2*2/3=10/6=1 2/3

2. Узнаем сколько километров дороги заасфальтировали за первую неделю: 40*3/20=6км

Узнаем сколько километров дороги осталось заасфальтировать: 40-6=34км

Узнаем сколько километров дороги заасфальтировали за вторую неделю: 34*4/17=8км

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