333*333怎么巧算
答案:2 悬赏:80 手机版
解决时间 2021-11-17 02:37
- 提问者网友：树红树绿
- 2021-11-16 10:51
333*333怎么巧算
最佳答案
- 五星知识达人网友：夜风逐马
- 2021-11-16 11:42
333×333
=333×3×111
=999×111
=(1000-1)×111
=111000-111
=111000-100-10-1
=110900-10-1
=110890-1
=110889
=333×3×111
=999×111
=(1000-1)×111
=111000-111
=111000-100-10-1
=110900-10-1
=110890-1
=110889
全部回答
- 1楼网友：人類模型
- 2021-11-16 12:03
333×333
=333×3×333x333
=(300+30+3)^2
=300x300+30x30+3x3+ 2x(300x30+30x3+3x300)
=90000+900+9 + 2x(9000+900+90 )
=90000+900+9 + 2x(10000-10 )
=90000+900+9 + 20000-20
=110882
=333×3×333x333
=(300+30+3)^2
=300x300+30x30+3x3+ 2x(300x30+30x3+3x300)
=90000+900+9 + 2x(9000+900+90 )
=90000+900+9 + 2x(10000-10 )
=90000+900+9 + 20000-20
=110882
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