2.62×0.27=2.62×0.3×0.9=0.786×(1-0.1)=0.786-0.786×0.1=0.7074望采纳 谢谢~
2.62×0.27=2.62×0.3×0.9=0.786×(1-0.1)=0.786-0.786×0.1=0.7074
2.62×0.27=2.62×(0.2+0.07)=0.524+0.1834=0.7074
2.62Ⅹ0.27=0.7074
