Предмет: Математика, автор: vladkuzmin1987

1)вырази в секундах 5 мин 7 мин 12 мин 14 мин 2 ч
2)в минутах 6 ч 13 ч 8 ч 15 ч
3)в часах 3600 сек 7200 сек 480 мин 540 мин

Ответы

Автор ответа: bspilner96
38


1) 1 мин = 60 сек
5 мин = 60 сек х 5 = 300 сек;    7 мин = 60 х 7 = 420 сек;  
12 мин = 60 х 12 = 720 сек;     14 мин = 840 сек;        2 ч = 120 мин = 7 200 сек
2) 1 ч 60 мин
6 ч = 60 мин х 6 = 360 мин;  13 ч = 60 х 13 = 780 мин;   8 ч = 480 мин; 
15 ч = 900 мин
3) 1 ч = 60 мин = 3600 сек
3 600 сек = 1 ч;   7200 сек = 7200 : 3 600 = 2 ч;  
480 мин = 480 : 60 = 8 ч ;     540 мин = 540 : 60 = 9 ч
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