<p style="text-align:center"><strong><span style="font-family: 宋体;font-size: 21px"><span style="font-family:宋体">茅田民族初中电子备课教案</span></span></strong></p><table width="554"><tbody><tr style="height:20px" class="firstRow"><td width="80" valign="top" colspan="3" style="padding: 0px 7px; border-width: 1px; border-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">年级学科</span></p></td><td width="59" valign="top" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">八数</span></p></td><td width="64" valign="top" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">主备人</span></p></td><td width="74" valign="top" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><br/></td><td width="64" valign="top" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">执教人</span></p></td><td width="74" valign="top" colspan="3" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><br/></td><td width="82" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">授课时间</span></p></td><td width="57" valign="top" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:仿宋_GB2312;font-size:14px">第 &nbsp;周</span></p></td></tr><tr style="height:20px"><td width="47" valign="top" colspan="2" 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;font-size:16px">课题 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p></td><td width="345" valign="top" colspan="7" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p style="text-align:center;line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 21px">幂的乘方</span></strong></p></td><td width="49" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; 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;font-size:16px">课型</span></p></td><td width="113" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:仿宋_GB2312;font-size:16px">新授</span></p></td></tr><tr style="height:85px"><td width="32" 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;font-size:16px">三</span></p><p><span style="font-family:宋体;font-size:16px">维</span></p><p><span style="font-family:宋体;font-size:16px">目</span></p><p><span style="font-family:宋体;font-size:16px">标</span></p></td><td width="522" valign="top" colspan="12" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">1．知识与技能</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;理解幂的乘方的运算性质，进一步体会和巩固幂的意义；通过推理得出幂的乘方的运算性质，并且掌握这个性质．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;2．过程与方法</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;经历一系列探索过程，发展学生的合情推理能力和有条理的表达能力，通过情境教学，培养学生应用能力．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;3．情感、态度与价值观</span></p><p><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;培养学生合作交流意义和探索精神，让学生体会数学的应用价值．</span></p><p><span style="font-family:宋体;font-size:14px">&nbsp;</span></p></td></tr><tr style="height:60px"><td width="32" 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;font-size:16px">重</span></p><p><span style="font-family:宋体;font-size:16px">点</span></p><p><span style="font-family:宋体;font-size:16px">难</span></p><p><span style="font-family:宋体;font-size:16px">点</span></p></td><td width="522" valign="top" colspan="12" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><strong><span style="font-family: 宋体;font-size: 14px">&nbsp;</span></strong></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">1．重点：幂的乘方法则．</span></p><p style="margin-left:47px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;2．难点：幂的乘方法则的推导过程及灵活应用．</span></p></td></tr><tr style="height:18px"><td width="32" 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;font-size:16px">设</span></p><p><span style="font-family:宋体;font-size:16px">计</span></p><p><span style="font-family:宋体;font-size:16px">说</span></p><p><span style="font-family:宋体;font-size:16px">明</span></p></td><td width="522" valign="top" colspan="12" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p style="text-indent:37px"><span style=";font-family:楷体_GB2312;font-size:19px">要突破这个难点，在引导这个推导过程时，步步深入，层层引导，要求对性质深入地理解</span></p></td></tr><tr style="height:21px"><td width="80" valign="top" colspan="3" 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;font-size:16px">教具准备 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p></td><td width="197" valign="top" colspan="3" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:仿宋_GB2312;font-size:16px">PPT课件</span></p></td><td width="80" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:宋体;font-size:16px">教学方法</span></p></td><td width="197" valign="top" colspan="5" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p><span style=";font-family:仿宋_GB2312;font-size:16px">讨论</span><span style="font-family:仿宋_GB2312;font-size:16px">、</span><span style=";font-family:宋体;font-size:16px">点拨</span><span style="font-family:宋体;font-size:16px">、</span><span style=";font-family:宋体;font-size:16px">探究</span></p></td></tr><tr style="height:18px"><td width="554" valign="top" colspan="13" 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 style="text-align:center"><span style=";font-family:宋体;font-size:16px">教 &nbsp;&nbsp;&nbsp;学 &nbsp;&nbsp;&nbsp;过 &nbsp;&nbsp;&nbsp;程</span></p></td></tr><tr style="height:23px"><td width="441" valign="top" colspan="11" 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 style="text-align:center"><span style=";font-family:宋体;font-size:16px">程 &nbsp;序 &nbsp;与 &nbsp;内 &nbsp;容</span></p></td><td width="113" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top-width: 1px; border-top-color: windowtext; border-bottom-width: 1px; border-bottom-color: windowtext;"><p style="text-align:center"><span style=";font-family:宋体;font-size:16px">个性化修改</span></p></td></tr><tr style="height:412px"><td width="441" valign="top" colspan="11" 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;font-size:14px">&nbsp;</span></p><p style="line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 19px">一、创设情境，导入新知</span></strong></p><p style="text-indent:29px;line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">【情境导入】</span></p><p style="text-indent:29px;line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;大家知道太阳，木星和月亮的体积的大致比例吗？我可以告诉你，木星的半径是地球半径的10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">倍，太阳的半径是地球半径的10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">倍，假如地球的半径为r，那么，请同学们计算一下太阳和木星的体积是多少？（球的体积公式为V=</span><span style="font-family:楷体_GB2312;font-size:19px"><img width="23" height="42" src="http://study.yanxiu.jsyxsq.com/proj/static/ueditor/themes/default/images/spacer.gif"/></span><span style="font-family:楷体_GB2312;font-size:19px"><img width="15" height="15" src="http://study.yanxiu.jsyxsq.com/proj/static/ueditor/themes/default/images/spacer.gif"/></span>r^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】进行计算，并在黑板上演算．</span></p><p style="text-indent:29px;line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">解：设地球的半径为1，则木星的半径就是10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">，因此，木星的体积为</span></p><p style="text-indent:29px;line-height:27px"><span style="font-family:楷体_GB2312;font-size:19px">V</span>_{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:sub">木星</span>}<span style="font-family:楷体_GB2312;font-size:19px">=</span><span style="font-family:楷体_GB2312;font-size:19px"><img width="23" height="42" src="http://study.yanxiu.jsyxsq.com/proj/static/ueditor/themes/default/images/spacer.gif"/></span><span style="font-family:楷体_GB2312;font-size:19px"><img width="15" height="15" src="http://study.yanxiu.jsyxsq.com/proj/static/ueditor/themes/default/images/spacer.gif"/></span>·（10^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=？（引入课题）．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师引导】（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=？利用幂的意义来推导．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】有些同学这时无从下手．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师启发】请同学们思考一下a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">代表什么？（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">呢？</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生回答】a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=a×a×a，指3个a相乘．（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">×10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">×10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">，就变成了同底数幂乘法运算，根据同底数幂乘法运算法则，底数不变，指数相加，10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">×10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">×10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">2+2+2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">6</span>}<span style=";font-family:楷体_GB2312;font-size:19px">，因此（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">6</span>}<span style="font-family:楷体_GB2312;font-size:19px">．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师活动】下面有问题：</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;利用刚才的推导方法推导下面几个题目：</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;（1）（a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（2）（2</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">4</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（3）（b</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（4）－（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】推导上面的问题，个别同学上讲台演示．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师推进】请同学们根据所推导的几个题目，推导一下（a）的结果是多少？</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】归纳总结并进行小组讨论，最后得出结论：</span></p><p style="text-indent:37px"><span style=";font-family:楷体_GB2312;font-size:19px">（a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">m</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style=";font-family:楷体_GB2312;font-size:19px">== a</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">mn</span>}<span style=";font-family:楷体_GB2312;font-size:19px">． &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;评析：通过问题的提出，再依据“问题推进”所导出的规律，利用乘方的意义和幂的乘法法则，让学生自己主动建构，获取新知：幂的乘方，底数不变，指数相乘．</span></p><p style="line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;二、范例学习，应用所学</span></strong></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【例】计算：</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;（1）（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">5</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（2）（b</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">4</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（3）（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">；（4）－（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">7</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">7</span>}<span style="font-family:楷体_GB2312;font-size:19px">．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【思路点拨】要充分理解幂的乘方法则，准确地运用幂的乘方法则进行计算．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师活动】启发学生共同完成例题．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】在教师启发下，完成例题的问题：并进一步理解幂的乘方法则：</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;解：（1）（10</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">5</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">3×5</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=10</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">15</span>}<span style=";font-family:楷体_GB2312;font-size:19px">； &nbsp;（3）（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=x</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">n×3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=x</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">3n</span>}<span style="font-family:楷体_GB2312;font-size:19px">；</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）（b</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">4</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=b</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">3×4</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=b</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">12</span>}<span style=";font-family:楷体_GB2312;font-size:19px">； &nbsp;&nbsp;&nbsp;（4）－（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">7</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">7</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=－x</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">7×7</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=－x</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">49</span>}<span style="font-family:楷体_GB2312;font-size:19px">．</span></p><p style="line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;三、随堂练习，巩固练习</span></strong></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;课本P97练习．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【探研时空】</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;计算：－x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">·x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style=";font-family:楷体_GB2312;font-size:19px">·（x</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">2</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">3</span>}<span style=";font-family:楷体_GB2312;font-size:19px">+x</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">10</span>}<span style="font-family:楷体_GB2312;font-size:19px">．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【教师活动】巡视、关注中等、中下的学生，媒体显示练习题．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;【学生活动】书面练习、板演．</span></p><p style="line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;四、课堂总结，发展潜能</span></strong></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;1．幂的乘方（a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">m</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=a</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">mn</span>}<span style=";font-family:楷体_GB2312;font-size:19px">（m，n都是正整数）使用范围：幂的乘方．方法：底数不变，指数相乘．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;2．知识拓展：这里的底数、指数可以是数，可以是字母，也可以是单项式或多项式．</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;3．幂的乘方法则与同底数幂的乘法法则区别在于，一个是“指数相乘”，一个是“指数相加”．</span></p><p style="line-height:27px"><strong><span style="font-family: 楷体_GB2312;font-size: 19px">&nbsp;&nbsp;&nbsp;&nbsp;五、布置作业，专题突破</span></strong></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;课本P104习题14.1第1、2题．</span></p><p style="text-indent:28px"><span style="font-family:宋体;font-size:14px">&nbsp;</span></p></td><td width="113" valign="top" colspan="2" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><br/></td></tr><tr style="height:41px"><td width="32" 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;font-size:16px">板书设计</span></p></td><td width="522" valign="top" colspan="12" style="padding: 0px 7px; border-left: none; border-right-width: 1px; border-right-color: windowtext; border-top: none; border-bottom-width: 1px; border-bottom-color: windowtext;"><p style="text-align:center;line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">幂的乘方</span></p><p style="line-height:27px"><span style="font-family:楷体_GB2312;font-size:19px">&nbsp;</span></p><p style="line-height:27px"><span style=";font-family:楷体_GB2312;font-size:19px">1、</span><span style=";font-family:楷体_GB2312;font-size:19px">幂的乘方的乘法法则</span><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;： </span><span style=";font-family:楷体_GB2312;font-size:19px">（a</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">m</span>}<span style="font-family:楷体_GB2312;font-size:19px">）</span>^{<span style="font-family:楷体_GB2312;font-size:19px;vertical-align:super">n</span>}<span style=";font-family:楷体_GB2312;font-size:19px">=a</span>^{<span style=";font-family:楷体_GB2312;font-size:19px;vertical-align:super">mn</span>}<span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p><span style=";font-family:楷体_GB2312;font-size:19px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p></td></tr></tbody></table><p><span style=";font-family:'Times New Roman';font-size:14px">&nbsp;</span></p><p><br/></p>