√125+5√1/45+1/4√3.2-3√0.2
问题描述：
√125+5√1/45+1/4√3.2-3√0.2
答
√125+5√1/45+1/4√3.2-3√0.2
=5√5+√5/9+1/4√16/5 -3√1/5
=5√5+1/3√5+1/5√5-3/5√5
=(5+1/3-2/5)√5
=75/15√5