简便计算过程如下65×25+225×5＝65×5×5+225×5＝325×5+225×5＝（325+225）×5＝550×5＝2750望采纳
=65×25+45×5×5=65×25+45×25=(65+45)×25=(100+10)×25=100×25+10×25=2500+250=2750
