5.24-5.24×0.9=5.24x(1-0.9)=5.24x0.1=0.524
简便运算是直接提取公约数5.24得5.24x(1-0.9)=5.24x0.1=0.524
5.24x(1-0.9)=5.24x0.1=0.524
5.24×(1－0.9)=5.24×0.1=0.524
=5.24乘以(1-0.9)=5.24乘以0.1=0.524
