12 7/18-5 17/18 решите плиз
12 7/18-5 17/18 = 11 25/18-5 17/18 = (11-5)+(25/18-17/18) = 6+8/18 = 6 8/18 = 6 4/9
223/18-107/18=116/18=59/9
58/9