Предмет: Математика, автор: verameyoje

Длина одного звена ломаной равна 6целых 2/3 см, и она составляет 2/5 длины всей ломаной. Найдите длину другого звена, если она составляет 3/10 длины всей ломаной.
Заранее спасибо:)

Ответы

Автор ответа: oganesbagoyan
2
6целых 2/3 см  =20/3  см(20/3 :2/5)*3/10 =20/3 *5/2*3/10 =  5  (см ).  
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1) 6 2/3 см : 2/5 =20/3 см  *5/2 = 50/3 см (длина всей ломаной) ;
2) 50/3 см *3/10 =5см 
ответ:  5 см .
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