福彩双色球专家擂台赛:利用因式分解计算:83*77
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/14 06:54:28
83*77
(80+3)*(80-3)=80^2-3^2=6391
(80+3)*(80-3)=80^2-3^2=6391
83*77
=(80+3)*77
=80*77+3*77
=6160+231
=6391
(80+3)*(80-3)=80^2-3^2=6391
(80+3)*(80-3)=80^2-3^2=6391
83*77
=(80+3)*77
=80*77+3*77
=6160+231
=6391