Вопрос школьника по предмету Математика
От одной станции в противоположных направлениях одновременно отьехали два поезда.Скорость одного 80 кмч ,а другого 90кмч.На каком расстоянии друг от друга будут поезда через 3ч?
Ответ учителя по предмету Математика
75*3=225км
82*3=246км
246-225=21км
Ответ 21км
82-75=7
7*3=21 км
Ответ 21 км
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