document.write ("<b>上一篇</b>：<a href='/DocHtml/699/2014/3/11/1791944234649.html'>正数和负数</a><br><b>下一篇</b>：<a href='/DocHtml/699/2016/3/7/2898954034647.html'>15.3．2整式的除法 （二）</a>")