0.41*1.59-8.43*0.59+4.42*0.59简便方法
问题描述：
0.41*1.59-8.43*0.59+4.42*0.59简便方法
答
原式=0.41x(1+0.59)-0.59x8.43+4.42x0.59
=0.59x(4.42+0.41-8.43)+0.41
=0.59x3.6+0.41
=3.6x(1-0.41)+0.41
=3.6-2.6x0.41
=2.534