5.6X69.32+138.64X0.05+693.2X0.43怎样巧算?大神们帮帮忙

分类: 作业答案 • 2022-01-09 18:02:33

问题描述：

5.6X69.32+138.64X0.05+693.2X0.43怎样巧算?大神们帮帮忙
急啊!快解题

答

5.6X69.32+138.64X0.05+693.2X0.43 =5.6X69.32+69.32X2X0.05+69.32X10X0.43 =69.32X(5.6+0.1+4.3) =69.32X10 =693.2