1.5/1.25 =1.5*0.8/(1.25*0.8)=1.2/1=1.284.67-(14.67+15.3）=84.67-14.67-15.3=80-15.3=74.76.4*（0.125*12.5)=8*0.125*0.8*12.5=1*10=100.04*1.38*25/0.46=0.04*25*0.46*3/0.46=1*3=3