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cate minute sunt in;200s,2700s,3300s,6ore,12ore,8ore si jumatate,5oresi un sfert......b)cate secunde sint in..10min,25min,40min,1ora,4ore,3ore si jum,2ore si un sfert?....c)cate ore sint in..420min,540min,1200min,7200s,14400s,21600s?

Răspuns :

b) 10min= 600; 25min=1500; 40 min=2400; 1h=3600; 4h=14400; 3hsi1/2=10800+1800=12600; 2h1/4=7200+900=8100
c)420min=7; 540min=9; 1200min=20h;7200s=2; 14400s=4h; 21600s=6h