7/9
4/15
94/115
Пошаговое объяснение:
2/9 + 5/9 = (2+5)/9 = 7/9
11/15 -7/15 = (11-7)/15 = 4/15
83/115 + 11/115 = (83+11)/115 = 94/115
7/9
4/15
94/115
Пошаговое объяснение:
2/9 + 5/9 = (2+5)/9 = 7/9
11/15 -7/15 = (11-7)/15 = 4/15
83/115 + 11/115 = (83+11)/115 = 94/115