a)23 min 44 s *6 =2 h 22 min 24s
23 min *6 =138 min = 2 h 18 min
44 s *6=264 s = 4 min 24 s
2 h 18 min+ 4 min 24 s=2 h 22 min 24s
b) 25 min 44 s*18
25 min*18=450 min = 7 h 30 min
44 s *18 = 792 s =13 min 12 s
7 h 30 min+13 min 12 s=7h 43 min 12 s
c) 4h 15 min 23s * 7 =
4h*7=28 h
15 min *7 =105 min =1 h 45 min.
23 s*7=161 s=2 min 41 sec
28 h+1 h 45 min.+2 min 41 sec=29 h 47 min 41 sec
d) 9h 45 min :6 = 1h 40 min
9x60+45=585 min
585:6= 97 min rest 3
97 min=1 h 37 min
e) 12h 24 min 24 s : 8 = 1 h 33 min 3 s
12x3600+24x60+24=44664 s
44664 s:8=5583 s
5583 s =1 h 1983 min.
1983 min=33 min 3 sec
f) 18 h 36 min 27 s : 3 = 6h 12 min 9 s
18x3600+36x60+27=66987 s
66987 :3=22329 s
22329 s= 6 h 729 min
729 min= 12 min 9 s
