25x(3/5)=15; 26x(2/13)=4; 125x(4/25)=20; 35x(6/7)=30；45x(5/9)=25；33x(8/5)=264/547x(3/5)=141/5；37x(3/4)=111/4；85x(6/17)=30; 27x(7/9)=21; 49x(7/9)=63；24x(4/3)=32；28x(7/4)=49；56x(2/7)=16；36x(1/5)...不用谢