5.74×1.8÷0.2能简便计算吗?=(5.74÷0.2)*1.8=(5.74÷0.2)*(2-0.2)=(5.74÷0.2*2)-(5.74÷0.2*0.2)=57.4-5.74=51.66
除以0.2变成乘以5。
解如图。
5.74×1.8÷0.2=5.74*9=5.74*(10-1)=5.74*10-5.74=57.4-5.74=51.66