Răspuns:
Explicație pas cu pas:
1. 5 h 45 min -2h 55 min= 4 h 105 min - 2 h 55 min = 2 h 50 min
2. 19 h 30 min - 10 h 50 min = 18 h 90 min - 10 h 50 min = 8 h 40 min
3. 8 h 15 min 30 sec - 4 h 25 min 45 sec = 7 h 75 min 30 s - 4 h 25 min 45 s
= 7 h 74 min 90 s - 4 h 25 min 45 s = 3 h 49 min 45 s
4. 5 h 35 min 20 sec- 2 h 50 min 50 sec
= 4 h 95 min 20 s - 2 h 50 min 50 s
= 4 h 94 min 80 s - 2 h 50 min 50 s = 2 h 44 min 30 s
