(4целых2/11 -1целая 6/11)+7целых4/11-(9/11+3целых7/11)=
(46/11-17/11)+81/11-(9/11+40/11)=29/11+81/11-49/11=110/11-49/11=61/11=5 целых 6/11
(4целых2/11 -1целая 6/11)+7целых4/11-(9/11+3целых7/11)=
(46/11-17/11)+81/11-(9/11+40/11)=29/11+81/11-49/11=110/11-49/11=61/11=5 целых 6/11