1 / 2 + 3 / 4 =3 / 4 + 5 / 8 =5 / 6 + 9 / 12 =8 / 2 + 3 / 4 =5 / 5 - 7 / 10 =5 / 3 - 5 / 6 =6 / 4 - 9 / 8 =4 / 8 - 3 / 16 =?
1 / 2 + 3 / 4 = 3 / 4 + 5 / 8 = 5 / 6 + 9 / 12 = 8 / 2 + 3 / 4 = 5 / 5 - 7 / 10 = 5 / 3 - 5 / 6 = 6 / 4 - 9 / 8 = 4 / 8 - 3 / 16 =.