Предмет: Математика, автор: Sashechka1804

а) Отрезок длиною 1 м разделили на равные части длиной 1/2 м каждая. Сколько частей получилось?

 

б) За 1/2 часа улитка проедолела 1/2000 км. С какой скоростью двигалась улитка? Сколько метров она проползает за час?

Ответы

Автор ответа: TigerYa
0
А)) Отрезок целый 1м;
1/2м это половина или 1:2=0,5м; 0,5+0,5=1м или 1/2•2= 2/2=1м;
1м: 1/2м= 2части
Ответ: 2части получилось. Б) 1/2ч=1/2000км;
1км=1000м; значит 1000/2000= 1/2м или =0,5м за 1/2часа;
1/2 это половина 1час: 2=0,5часа

За час 0,5м•2=1м/ч или 1/2•2=2/2=1м ползёт улитка Скорость улитки 1м/ч или 1м=1/1000км/ч или 1:1000= 0,001км/ч
Ответ: Скорость улитки 1м/час или 1/1000км/ч и за час она проползет 1м.
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