а) 0,(7) = 0.777... = 7/9
б) 7,5(4) = 7 + 5.444... = 7 + 5/9 = 7*9/9 + 5/9 = 68/9
в) 1,0(12) = 1 + 0.121212... = 1 + 12/99 = 1*99/99 + 12/99 = 111/99 = 37/33
а) 0,(7) = 0.777... = 7/9
б) 7,5(4) = 7 + 5.444... = 7 + 5/9 = 7*9/9 + 5/9 = 68/9
в) 1,0(12) = 1 + 0.121212... = 1 + 12/99 = 1*99/99 + 12/99 = 111/99 = 37/33