这个很容易,关键是小数点的移动=3.14*5.4+3.14*3.6+3.14*10=3.14*(5.4+3.6+10)=3.14*19=59.66满意望采纳
原式=31.4×0.54+31.4×0.36+31.4=31.4×(0.54+0.36+1)=31.4×1=31.4