解:5.5.5=25,这样填计算符号5x√(5x5)=25=5x5=25√5x√5x5=25=5x5=255x√5x√5=25=5x5=25√(5x5)x5=25=5x5=25
(√5)*(√5)*5=25
5×√5×√5=25