№1.
32/9+(-9/4)+29/6-17/3=
32/9-9/4+29/6-17/3=
49/18-9/4=(98-81)/36=17/36
№2.
-17/7+121/14+(-110/21)=
121/14-34/14-110/21=
87/14-110/21=
(261-220)/42=41/42
№3.
-16,54+(-9,31)-11,27-(-23,38)=
23,38-16,54-9,31-11,27=
2338/100-1654/100-931/100-1127/100=
(2338-1654-931-1127)/100=-1374/100=-13,74