Предмет: Математика, автор: nikitarukher

Власна швидкість човна 23 цілих 3/8 км\год, а швидкість його руху проти течії ріки 20 цілих 1/4 км/год Обчисли швидкість течії ріки та швидкість руху човна за течією ріки

Ответы

Автор ответа: diana3158

Ответ:

23 цілих 3/8 - 20 цілих 1/4

потрібно знайти спільний знамнник (в данному випадку 8). Додатковий множник до від'ємника 2.

Тоді, 23 цілих 3/8 - 20 цілих 2/8 = 3 цілих 1/8 (км/год)

швидкість течії.

23 цілих 3/8 + 3 цілих 1/8 = 26 цілих 4/8 (км/год) швидкість човна за течією.

Kittylisaa: Можно именно по действиям,как в задачах пишут

Kittylisaa: Нет,в последним действии 26 целых 1/2 у меня в тетради ответы.

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