5.60成69.32家138.64成0.05家693.2成0.43简算

5.60*69.32+138.64*0.05+693.2*0.43
=5.60*69.32+69.32*2*0.05+69.32*10*0.43
=5.60*69.32+69.32*0.1+69.32*4.3
=69.32*（5.60+0.1+4.3）
=69.32*10
=693.2