1 целая 4/9 минус 2 целых 5/18
1 4/9-2 5/18=
=13/9-41/18=
=26/18-41/18=
=(26-41)/18=
=-15/18=
=-5/6
Ответ:-5/6
(1 4/9)-(2 5/18)=13/9-41/18=26/18-41/18=(26-41)/18=-15/18=-5/6