А)5(2/6)-5/6=4(8/6)-5/6=4(3/6) или 4(1/2) б)2(1/3)-2/3=1(4/3)-2/3=1(2/3) в)4(5/9)-8/9=3(14/9)-8/9=3(6/9) или 3(2/3) г)3(1/12)-1(5/12)=2(1/12)-5/12=1(13/12)-5/12=1(8/12) или 1(2/3) д)6(3/7)-5(5/7)=1(3/7)-5/7=10/7-5/7=5/7 е)4(1/8)-3(5/8)=1(1/8)-5/8=9/8-5/8=4/8 или 1/2