原式=666×333+333+111×3×333=333×(666+1+333)=333×1000=333000
667x333+111x999
=667x333+333x333
=(667+333)x333
=333000
667x333+111x999=333x(667+333)=333x1000=333000
小气鬼,没分
667x333+111x999=667x333+333x333=333x(667+333)=333x1000=333000
667*333+111*999=667*3*111+111*999=111*(667*3+999)=111*3000=333000