巧算265+266+267+268+269+270+271+272+273 =( )×( ) =( )
问题描述:
巧算265+266+267+268+269+270+271+272+273 =( )×( ) =( )
答
269 9
巧算265+266+267+268+269+270+271+272+273 =( )×( ) =( )
269 9