初学奥数题牛刀小试 标签：工程问题
<p><font face=" ,Arial">a</font><font face=" ,Arial">b</font><font face=" ,Arial">c</font></p><p><font face=" ,Arial">a</font><font size="２">b</font><font lang="ZH-CN" face="宋体">×</font><font face=" ,Arial">c</font><font size="2">a</font><font face=" ,Arial">=abca</font></p><p><font face=" ,Arial">abca</font></p><p><strong>解答与分析</strong></p><p>2<font size="2">5</font><font lang="ZH-CN" face="宋体">×</font><font face=" ,Arial">9</font><font size="2">2</font><font face=" ,Arial">2023</font></p>
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