0.75*4/3-3/8*4/5=3/4*4/3-3/10=1-0.3=0.7
0.75x4/3-3/8x4/5=3/4x4/3-3/8x4/5=1-3/10=7/10求采纳
0.75*4/3-3/8*4/5=1-3/10=7/10