<p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学内容】</span> <span style="font-family:宋体">北师大版六年级数学上册第</span><span style="font-family:宋体">39—40页《百分数的认识》</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学目标】</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">1.</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">结合解决实际问题的过程，体会引入百分数的必要性，理解百分数的意义，会正确读写百分数。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">2.在具体情境中，解释百分数的意义，体会百分数与日常生活的密切联系,并适时渗透思想教育。</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学重点】理解百分数的意义，会正确读、写百分数。</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学难点】理解百分数的意义，百分数与分数的联系和区别。</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学准备】多媒体</span></span><a href="http://www.5ykj.com/"><span style="font-family: 宋体;color: rgb(0, 0, 0);letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">课件</span></span></a></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">【教学过程】</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">一、&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">创设情境</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">，</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">提出问题</span><span style="font-family:宋体">&nbsp;</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">1、同学们</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">喜欢踢足球或看足球</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">比赛</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">吗？</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">近段某学校正在进行一场激烈的足球比赛，猛虎队获得一次罚点球的机会，他们准备派三名队员中的一名去罚点球。请看大屏幕，这是这三名队员近期罚点球的统计，你认为该选派哪名队员合适呢？同桌交流一下。</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（投影表格）</span></span></p><table width="568"><tbody><tr class="firstRow"><td width="189" valign="top" style="padding: 0px 7px; border-width: 1px; border-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">队员</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-width: 1px; border-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">罚球数</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">/个</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-width: 1px; border-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">进球数</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">/个</span></span></p></td></tr><tr><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">淘气</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">20</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">18</span></span></p></td></tr><tr><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">奇思</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">10</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">8</span></span></p></td></tr><tr><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">不马虎</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">25</span></span></p></td><td width="189" valign="top" style="padding: 0px 7px; border-left-width: 1px; border-left-color: windowtext; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">21</span></span></p></td></tr></tbody></table><p style="margin-left:56px;text-indent:0"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">2、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">指明汇报：选派进球数多的队员。</span></span></p><p style="text-indent:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">3、有没有异议？</span></span></p><p style="text-indent:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">4、因为他们罚球总数不一样，</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">罚中次数多，罚球的质量</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">也不</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">一定是最高的</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">。</span></span></p><p style="margin-left:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">5、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">同意这样的观点吗？那该怎么办？</span></span></p><p style="text-indent:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">6、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">先算出进球数占罚球总数的几分之几，再进行比较，才能确定选派哪名队员。</span></span></p><p style="margin-left:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">7、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">指明汇报：每名队员进球数占罚球总数的几分之几，</span></span></p><p style="margin-left:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">8、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">现在你能一下子看出来吗？</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">怎么办</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">？</span></span></p><p style="text-indent:56px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">9、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">通分，把他们都化成分母是</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">100的分数。学生口述分别是：90/100,80/100,84/100(教师板书）</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">现在我们就很清楚地看出大小，确定选派的队员。</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;<span style="font-family:宋体">10、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">像这样的数我们可以把它写成另外一种形式，</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">如</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">84/100可以写成84%</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（教师板书）见过吗？认识吗？</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">对，</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">它</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">就是我们今天要学习的百分数。（板书课题）</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">二、合作交流</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">探究</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">新知</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（一）引导认识百分数的写法、读法</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">1、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">认识百分号（教师板书）</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">2、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">写百分数的时间，先写分子部分，再在后面添上</span><span style="font-family:宋体">%。</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">3、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">学生试读，教师板书。</span></span></p><p style="text-indent:37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">4、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">学生试写三个百分数，同桌互读。</span></span></p><p style="margin-left: 37px;text-indent: 0"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">（二）</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">探究</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">百分数的意义。</span></span></p><p style="margin-left: 37px;text-indent: 0"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">（三）</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;<span style="font-family:宋体">1、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">根据</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">分数的意义</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">，</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">学生试说百分数的意义，教师小结：</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">百分数表示一个数是另一个数的百分之几。百分数也叫百分比、百分率。</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">教师板书</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">）</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:宋体">2、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">在具体情境中尝试解释、理解百分数的意义</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">。（屏幕出示）</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">3、学生汇报，教师小结。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">4、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">现在，请大家仔细观察这些百分数，你发现了什么？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">引导学生得出：百分</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">号前面的数</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">可以是整数，也可以是小数，可以小于</span><span style="font-family:宋体">100，也可以等于100，还可以大于100</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">5、同桌互相说一说生活中还见过哪些百分数，并说一说所表示的意义。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">6、老师这里也收集了一些信息，同桌互相说一说，百分数所表示的意义，并指明汇报。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（三）百分数与分数的异同点</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">1、同桌交流，百分数与分数有哪些相同点和不同点？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">2、指名汇报。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">3、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">下面哪些分数可以写成百分数来表示？哪些不能？为什么？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;<span style="font-family:宋体">（</span><span style="font-family:宋体">1）</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">鸡的只数是鸭的</span><span style="font-family:宋体">75/100。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">2</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">）</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">一根绳子用去的米数是总米数的</span><span style="font-family:宋体">51/100。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;<span style="font-family:宋体">（</span><span style="font-family:宋体">3）</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">一堆煤重</span><span style="font-family:宋体">97/100吨。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">为什么第一、二题中的分数可以写成百分数，而第三题不能呢？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">三</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">巩固练习、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">应用提高</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">1.六⑴班准备派下面队员中的一名参加学校的套圈比赛。下面是他们近期套圈情况统计。</span></span></p><p style="text-indent: 28px"><img width="441" height="146" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:Calibri;font-size:14px">&nbsp;</span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">你认为该派哪名队员？说说你的理由。</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">2、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">读出下面的百分数，并说一说这些百分数所表示的意思。</span></span></p><p style="text-indent: 19px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">⑴姚明加盟NBA联赛的第一年，投篮命中率为49.8%。</span></span></p><p style="text-indent: 19px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">⑵食物中蛋白质含量如下表。</span></span></p><p style="text-indent: 14px"><img width="374" height="77" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:Calibri;font-size:14px">&nbsp;</span></p><p style="text-indent: 21px"><span style=";font-family:宋体;font-size:21px"><span style="font-family:宋体">⑶果园九月份的产量是八月份的</span><span style="font-family:Calibri">120%</span><span style="font-family:宋体">。</span></span></p><p style="text-indent: 21px"><span style="font-family:宋体;font-size:21px">3.&nbsp;</span><span style=";font-family:宋体;font-size:21px"><span style="font-family:宋体">估计每幅图的阴影部分占整幅图的百分之几，然后与对应的百分数连起来。</span></span></p><p><img width="115" height="65" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:宋体;font-size:14px">&nbsp;&nbsp;</span><img width="108" height="67" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:宋体;font-size:14px">&nbsp;&nbsp;</span><img width="91" height="80" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:宋体;font-size:14px">&nbsp;</span><img width="93" height="70" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><img width="88" height="80" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/></p><p style="text-indent: 21px"><span style=";font-family:宋体;font-size:21px"><span style="font-family:Calibri">33% &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;50% &nbsp;&nbsp;&nbsp;&nbsp;75% &nbsp;&nbsp;&nbsp;&nbsp;12.5% &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25%</span></span></p><p><span style=";font-family:宋体;font-size:19px"><span style="font-family:Calibri">4.</span><span style="font-family:宋体">填一填。</span></span></p><p style="text-indent: 19px"><span style=";font-family:宋体;font-size:19px">&nbsp;&nbsp;<span style="font-family:宋体">光明小学参加课外小组的同学有</span><span style="font-family:Calibri">100</span><span style="font-family:宋体">人，参加各个小组的人数如下表。</span></span></p><p><img width="577" height="122" src="http://study.teacheredu.cn/proj/static/ueditor/themes/default/images/spacer.gif"/><span style=";font-family:宋体;font-size:14px">&nbsp;</span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:宋体">5</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">、用百分数来表示成语</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">其实百分数的知识不仅数学课堂上要学，语文知识中也会遇到。</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">（课件出示）你能用百分数来表示下面的成语吗？</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">百发百中</span> <span style="font-family:宋体">　百里挑一　</span> <span style="font-family:宋体">十拿九稳</span> <span style="font-family:宋体">　一举两得</span> <span style="font-family:宋体">　半壁江山</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">&nbsp;&nbsp;&nbsp;</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">我们上数学课把语文中的有些成语也巩固了一番，用我们刚才说到的成语就是？（一举两得）</span></span></p><p><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">四</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">、全课总结</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">畅谈收获</span><span style="font-family:宋体">&nbsp;&nbsp;</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">1、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">你有什么收获？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px">2、</span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">你能用一个百分数来评价一下自己课上的表现吗？</span></span></p><p style="text-indent: 37px"><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">3、</span></span><span style="font-family: 宋体;letter-spacing: 0;font-size: 19px"><span style="font-family:宋体">最后老师想用这句话来结束我们今天这节课：</span><span style="font-family:宋体">“天才是1%的灵感+99%的汗水”。一个人的成功是与不懈的努力和奋斗分不开的，不经历风雨怎能见彩虹？希望同学们都能付出100%的努力去创造你们未来人生100%的辉煌。</span></span></p><p><br/></p>