0.25×（4+0.4） =0.25x4+0.25x0.4=1+0.1=1.1或者0.25×（4+0.4） =0.25x4.4=0.25x4x1.1=1x1.1=1.1祝天天向上。
=0.25*4+0.25*0.4=1+0.1=1.1用乘法分配律，望采纳，谢谢
0.25*（4+0.4）=0.25*4+0.25*0.4=1+0.1=1.1
