【1-（0.5-0.25）】*0.
问题描述：
【1-（0.5-0.25）】*0.
答
=(1-0.25)*0.8
=0.75*0.8
=0.6
【1-（0.5-0.25）】*0.
=(1-0.25)*0.8
=0.75*0.8
=0.6