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Calculati in secunde : 3 h+15 min +20 s=? s; 35 min+50s=?s; 200s+2h=? s; 5h-240 min - 3540 s= ?s; 2,5h+30,5min=?s.URGENT

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Vladcatalin78
a) 3h+15min= 10800+900=11700+20sec=11720 sec b) 35 min+50sec=2100 sec+50sec= 2150sec c) 200 sec+2 ore= 200 sec+ 7200 sec=7400 sec d) 5ore-240min-3540sec= 18000sec-14400 sec-3540 sec= 60 e) 2,5ore+30,5min=9000+1830=10830

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