您好：3/5×1/8+2/5÷8=3/5x1/8+2/5x1/8=(3/5+2/5)x1/8=1x1/8=1/8[1－(1/3+1/2)]÷2/3=(1-5/6)÷2/3=1/6÷2/3=1/4（2－3/4)x=4/55/4x=4/5x=4/5÷5/4x=16/253/4x+3/2x=9/169/4x=9/16x=9/16÷6/4x=1/4 如果本题有什...