Răspuns:
Explicație pas cu pas:
11 h si 35 min - 9 h si 48 min =
= ( 660 minute + 35 minute ) - ( 540 minute + 48 minute ) =
= 695 minute - 588 minute =
= 107 minute
1 h = 60 minute
11 h x 60 = 660 minute
9 h x 60 = 540 minute
13 h si 20 min - 10 h si 55 min =
= ( 780 minute + 20 minute ) - ( 600 minute + 55 minute ) =
= 800 minute - 655 minute =
= 145 minute
1 h = 60 minute
13 h x 60 = 780 minute
10 h x 60 = 600 minute
21 h si 43 min - 14 h si 54 min =
= ( 1260 minute + 43 minute ) - ( 840 minute + 54 minute ) =
= 1303 minute - 894 minute =
= 409 minute
1 h = 60 minute
21 h x 60 = 1260 minute
14 h x 60 = 840 minute
