作者查詢 / qazxsw123
作者 qazxsw123 在 PTT [ Math ] 看板的留言(推文), 共6則
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1F→: https://i.imgur.com/mpYuA3I.jpg03/17 00:32
2F→: 找九九乘法規律尾數相乘為403/17 00:33
3F→: 因為連續2個個位數相乘沒有尾數=403/17 00:34
4F→: 所以要從連續三個數開始找03/17 00:34
5F→: 只有2*3*4和7*8*903/17 00:34
6F→: 慢慢找就行了03/17 00:35
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