Выполните действия 5/8+7/8-1/8 5/9-(4/9-1/9)
5/8+7/8-1/8 = (5+7-1)/8=11/8 5/9-(4/9-1/9)=5/9-((4-1)/9)=5/9-3/9=(5-3)/9=2/9