1.25-8÷6.4×0.2=1.25-1.25×0.2=1.25-0.25=1验算1+8÷0.64×02=1+1.25×0.2=1+0.25=1.25
1.25-8/6.4*0.2=1.25-1.25*0.2=1.25-0.25=1
