Выполните действие 3/4-1/4 5/8+3/8 7/12-5/12 8/15+2/15 28/45-13/45
3/4 - 1/4 = 1/2 5/8 + 3/8 = 1 7/12 - 5/12 =1/6 8/15 + 2/15 = 2/3 28/45 - 13/45 = 1/3