简算 5.6*69.32+138.64*0.05+693.2*0.43
问题描述：
简算 5.6*69.32+138.64*0.05+693.2*0.43
过程一步也不要省略,OK?
答
5.6*69.32+138.64*0.05+693.2*0.43
=5.6*69.32+69.32*2*0.05+69.32*10*0.43
=5.6*69.32+69.32*0.1+69.32*4.3
=69.32*(5.6+0.1+4.3)
=69.32*10
=693.2