网投app

  • <tr id='y6aFlr'><strong id='y6aFlr'></strong><small id='y6aFlr'></small><button id='y6aFlr'></button><li id='y6aFlr'><noscript id='y6aFlr'><big id='y6aFlr'></big><dt id='y6aFlr'></dt></noscript></li></tr><ol id='y6aFlr'><option id='y6aFlr'><table id='y6aFlr'><blockquote id='y6aFlr'><tbody id='y6aFlr'></tbody></blockquote></table></option></ol><u id='y6aFlr'></u><kbd id='y6aFlr'><kbd id='y6aFlr'></kbd></kbd>

    <code id='y6aFlr'><strong id='y6aFlr'></strong></code>

    <fieldset id='y6aFlr'></fieldset>
          <span id='y6aFlr'></span>

              <ins id='y6aFlr'></ins>
              <acronym id='y6aFlr'><em id='y6aFlr'></em><td id='y6aFlr'><div id='y6aFlr'></div></td></acronym><address id='y6aFlr'><big id='y6aFlr'><big id='y6aFlr'></big><legend id='y6aFlr'></legend></big></address>

              <i id='y6aFlr'><div id='y6aFlr'><ins id='y6aFlr'></ins></div></i>
              <i id='y6aFlr'></i>
            1. <dl id='y6aFlr'></dl>
              1. <blockquote id='y6aFlr'><q id='y6aFlr'><noscript id='y6aFlr'></noscript><dt id='y6aFlr'></dt></q></blockquote><noframes id='y6aFlr'><i id='y6aFlr'></i>

                巧计试商歌学好数学知识点

                来源于网络  2013-04-26 13:56 】 【我要纠错

                  一二丢,八九收,

                  当作整十来试商;

                  “四舍”商大减去一,

                  “五入”商小加上一;

                  同头无除商八、九,

                  除数折半商四、五;

                  除完不忘做比较,

                  余数必小要记牢。

                延伸阅读:小学数学 数学知识点

                本文转◢载地址:巧计试商歌学好数学知识点

                中小学移动应用

                精品推荐