Posted by haifeng on 2015-08-31 16:48:36 last update 2015-08-31 16:48:36 | Edit | Answers (1)
如果
\[ \begin{aligned} 6+4&=210,\\ 9+2&=711,\\ 8+5&=313,\\ 5+2&=37,\\ \end{aligned} \]
请问 $7+6=?$
1
Posted by haifeng on 2015-08-31 16:49:46
此规则应是
\[ x+y=(x-y).(x+y) \]
因此, 在此规则之下, $7+6=113$.