1целых4/11-4/11= 2целых5/9-1целых5/9= 2целых4/11-1целых4/11

1) 1 4/11 - 4/11 = 15/11 - 4/11 = 11/11 =12) 2 5/9 - 1 5/9 = 23/9 - 14/9 = 9/9 = 13) 2 4/11 - 1 4/11 = 26/11 - 15/11 = 11/11 = 1