5.669.32+138.640.05+693.4*0.43 简算

分类: 作业答案 • 2021-12-20 01:27:08

问题描述：

5.6*69.32+138.64*0.05+693.4*0.43 简算

答

= 5.6*69.32 + 2*0.05*69.32 + 69.32*10*0.43 + 0.2*0.43
= 5.7*69.32+4.3*69.32+0.086
= 10*69.32 + 0.086
= 693.2 +0.086
= 693.286

5.6*69.32+138.64*0.05+693.4*0.43 简算