8:10+46=8:56
8.56+35=9.31
9.31+140 (2ч 20мин)=11.51
3/12=(сокращаем на 3) =1/4
4/12=(Ha 4)=1/3
6/54=(Ha 6)=1/9
25/70=(Ha 5) =5/14
26/65=(Ha 13)= 2/5
12/60=(Ha 12)=1/5
36/48=(Ha 6)=6/8=(еще на 2)=3/4
35/105=(Ha 7)=5/15=1/3
480/720=(Ha 80)=6/9=2/3
204/306=(Ha 6)34/51=(Ha 17)=2/3