<p style="text-indent: 37px; line-height: 150%; text-align: center;"><strong><span style="line-height: 150%; font-weight: bold; font-size: 21px; font-family: 宋体;"></span><span style="font-family: 宋体; line-height: 150%; font-weight: bold; font-size: 24px;">一、100以内的认识</span></strong></p><p style="text-indent: 37px; line-height: 150%; text-align: center;"><strong><span style=";font-family:宋体;line-height:150%;font-weight:bold;font-size:19px">1<span style="font-family:宋体">．数数、数的组成</span></span></strong></p><p style="text-indent:37px;text-align:center;line-height:150%"><strong><span style=";font-family:宋体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:宋体">第</span>1<span style="font-family:宋体">课时&nbsp; <br/></span></span></strong></p><p style="text-indent:32px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:16px"><span style="font-family:黑体">【教学内容】</span> &nbsp;</span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">教科书第</span>1~3<span style="font-family:宋体">页例</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">、例</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">及课堂活动</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">—</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">题，练习一的</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">题。</span></span></p><p style="text-indent:32px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:16px"><span style="font-family:黑体">【教学目标】</span></span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">1. </span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">建立计数单位</span>“百”的直观印象，会用计数单位“十”数出</span><span style=";font-family:宋体;line-height:150%;font-size:16px">100<span style="font-family:宋体">以内的数，会正确地数出“翻坎数”。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">2.</span><span style=";font-family:ˎ̥;line-height:150%;font-size:16px">&nbsp;<span style="font-family:宋体">经历数概念形成的过程，</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">直观理解</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px">100<span style="font-family:宋体">以内数，知道</span><span style="font-family:Times New Roman">100</span><span style="font-family:宋体">以内的数是由几个十和几个一组成的。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">3</span><span style=";font-family:ˎ̥;line-height:150%;font-size:16px"><span style="font-family:宋体">能结合实际进行估计，发展学生的数感</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">4.</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">初步体验</span>100以内的数与生活的密切联系，感受100以内数的作用。</span></p><p style="text-indent:24px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:16px"><span style="font-family:黑体">【教学难重点】</span></span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">教学重点：用数数的方式帮助学生建立计数单</span>“百”的直观印象，会数</span><span style=";font-family:宋体;line-height:150%;font-size:16px">100<span style="font-family:宋体">以内的数，初步了解数的组成。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">教学难点：数翻坎数及对翻坎数的理解。理解计数单位</span>“百”</span></p><p style="text-indent:32px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:16px"><span style="font-family:黑体">【教学准备】</span></span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">教师准备：多媒体课件、视频展示台、计数器、铅笔</span>100<span style="font-family:宋体">支。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">学生准备：小棒</span>100<span style="font-family:宋体">根，橡皮筋</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">个。</span></span></p><p style="text-indent:32px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:16px"><span style="font-family:黑体">【教学过程】</span></span></strong></p><p style="text-indent:37px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:黑体">一、创设情景，引入新课</span></span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">1.<span style="font-family:宋体">联系旧知。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（</span>1<span style="font-family:宋体">）</span></span><span style=";font-family:ˎ̥;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">我们学习了数学王国的几个数娃娃</span>11~20<span style="font-family:宋体">，你能亲切地和他们一个个地打招呼吗？</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（</span>2<span style="font-family:宋体">）</span></span><span style=";font-family:ˎ̥;line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;<span style="font-family:宋体">全体学生数数，</span></span><a href="http://www.3edu.net/Soft/"><span style=";font-family:ˎ̥;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">课件</span></span></a><span style=";font-family:ˎ̥;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">出示</span>11——20<span style="font-family:宋体">各数</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>3<span style="font-family:宋体">）生活中是不是只用</span><span style="font-family:Times New Roman">20</span><span style="font-family:宋体">以内的数就够了呢？我们来看这样一幅图片。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">2.<span style="font-family:宋体">出示单元主题图，引发认识需要。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">观察这幅图片，根据图片上提供的信息自由地说。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">看来在这里</span>20<span style="font-family:宋体">以内的数不够用了，下面我们就一起来学习比</span><span style="font-family:Times New Roman">20</span><span style="font-family:宋体">更大的，</span><span style="font-family:Times New Roman">100</span><span style="font-family:宋体">以内的数，这节课我们继续来学习数数。（板书课题 &nbsp;&nbsp;数数 数的组成 ）</span></span></p><p style="text-indent:37px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:黑体">二、活动操作，探索新知</span></span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（一）教学例</span>1</span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">1.<span style="font-family:宋体">探究数数方法。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">同学们每人拿出</span>20<span style="font-family:宋体">根小棒数一数。说一说是怎样数的。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（板书：一根一根地数、</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">十根十根地数</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">）</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">今天这节课我们重点用这两种方法来数出比</span>20<span style="font-family:宋体">更大的数。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">2.</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">感知一根一根地数。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（</span>1<span style="font-family:宋体">）接着数。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">①</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">刚才你们从</span>0<span style="font-family:宋体">数到</span><span style="font-family:Times New Roman">20</span><span style="font-family:宋体">，真了不起，现在请同桌的两个同学把手中小棒合起来，猜猜这堆小棒一共有多少根？</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;</span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">到底有多少根呢？谁愿意领着大家一起数？</span> </span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">②</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">听清要求，一根一根地数，学生</span>4人一组，每数10根捆成一捆，合作完成数出100根小棒。</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(51,51,51);font-size:16px"><span style="font-family:宋体">从</span>1</span><span style=";font-family:宋体;line-height:150%;color:rgb(51,51,51);font-size:16px"><span style="font-family:宋体">数</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(51,51,51);font-size:16px"><span style="font-family:宋体">到</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(51,51,51);font-size:16px">100</span><span style=";font-family:宋体;line-height:150%;color:rgb(51,51,51);font-size:16px"><span style="font-family:宋体">）。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">板书</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">;</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;100个一是一百。</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;</span></p><p style=";text-indent:32px;text-align:left;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">（</span>2<span style="font-family:宋体">）翻坎数</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">当数到</span>29<span style="font-family:宋体">根时，接下来后面是多少呢？</span><span style="font-family:Times New Roman">39</span><span style="font-family:宋体">后面呢？</span></span></p><p style=";text-indent:32px;text-align:left;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">①用小棒演示：集体操作，一边摆小棒一边数数。</span></p><p style=";text-indent:32px;text-align:left;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">②</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">用计数器演示：</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">③</span><span style=";font-family:'Times New Roman';line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">脱离小棒数</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">和计数器数</span></span><span style=";font-family:'Times New Roman';line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;</span><span style=";font-family:'Times New Roman';line-height:150%;color:rgb(0,0,0);font-size:16px">&nbsp;</span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:'Times New Roman';line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">那谁知道</span>59<span style="font-family:宋体">、</span><span style="font-family:Times New Roman">79</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">99</span><span style="font-family:宋体">的下一个数是几，说说你的想法。</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">生自由回答。</span></span></p><p style=";text-indent:32px;text-align:left;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">3.</span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">感知十根十根地数。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>1<span style="font-family:宋体">）理解</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">个一是</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">。（数</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">根捆成一捆，数</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">根捆成一捆）</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>2<span style="font-family:宋体">）理解</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">个十是</span><span style="font-family:Times New Roman">100</span><span style="font-family:宋体">。（一捆一捆的数 ）</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">得出结论（</span>100<span style="font-family:宋体">枝）</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">个十是</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">，</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">个十是</span><span style="font-family:Times New Roman">20</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">……<span style="font-family:Times New Roman">10</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">个十是</span>100<span style="font-family:宋体">。 </span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px"><span style="font-family:宋体">板书：</span>10<span style="font-family:宋体">个十是一百。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">4.</span><span style=";font-family:宋体;line-height:150%;font-size:16px">&nbsp;<span style="font-family:宋体">两种方法结合起来数。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">引导学生发现</span>10<span style="font-family:宋体">根</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">根地数比一根一根地数要快得多。但是</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">根</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">根地数能数出</span><span style="font-family:Times New Roman">23</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">58</span><span style="font-family:宋体">这些数吗？ &nbsp;&nbsp;</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">学生讨论怎样数出</span>23<span style="font-family:宋体">、</span><span style="font-family:Times New Roman">58</span></span></p><p style=";line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">看到这</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px">23</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">根小棒，说说</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px">23</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">里面有几个十，几个一？</span></span></p><p style=";line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:宋体">教师引导学生回答：一捆就是一个十，</span>2<span style="font-family:宋体">捆就是</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">个十，还剩</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋体">个单根就是</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋体">个一，所以</span><span style="font-family:Times New Roman">23</span><span style="font-family:宋体">里面有</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">个十和</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋体">个一。</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（板书：</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px">2</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">个十，</span></span><span style=";font-family:宋体;line-height:150%;font-size:16px">3</span><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">个一）</span>&nbsp; </span></p><p style="text-indent:37px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:黑体">二、教学例</span>2</span></strong></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">下面我们用同学们数数的方法来解决一个简单的问题。显示例</span>2<span style="font-family:宋体">图片。</span></span></p><p style="text-indent:24px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">你知道其中小灰兔有多少吗？说一说自己是怎样数的。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">那么这个</span>28<span style="font-family:宋体">是由几个十和几个一组成的？</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">小灰兔和小白兔一共有多少只呢？依然用类似的数数方法，数出它们的只数。</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">那么</span>55<span style="font-family:宋体">又是由几个十和几个一组成呢？</span></span></p><p style="text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">再请同学们数一数一共有多少只小动物。学生数后抽学生回答，并说一说是怎样数的。</span></span></p><p style="line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">&nbsp;</span><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:黑体">三、练习应用，巩固深化</span></span></strong></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">1.<span style="font-family:宋体">课堂活动第</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">，</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">题。</span></span></p><p style=";text-indent:32px;text-align:left;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>1<span style="font-family:宋体">）第</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">题由学生自由数，然后抽几名同学展示数法。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>2<span style="font-family:宋体">）第 </span><span style="font-family:Times New Roman">2 </span><span style="font-family:宋体">题让学生数一数一本作业本有多少页？学生自由数，数后汇报。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px">2.<span style="font-family:宋体">练习一第</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">题。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>1<span style="font-family:宋体">）第</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">题学生独立完成后交流，交流时说一说他们是怎样数的。</span></span></p><p style=";text-indent:32px;line-height:150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">（</span>2<span style="font-family:宋体">）第</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">题先口答，再问一问如像三十九添上一是四十，就是几个十。学生在数数的过程中，对于数像</span><span style="font-family:Times New Roman">29</span><span style="font-family:宋体">后面是几，</span><span style="font-family:Times New Roman">39</span><span style="font-family:宋体">后面是几</span></span><span style=";font-family:宋体;line-height:150%;color:rgb(0,0,0);font-size:16px">……这种翻坎数比较困难，教师可适当引导学生用小棒辅助思考。</span></p><p style="text-indent:37px;line-height:150%"><strong><span style=";font-family:黑体;line-height:150%;font-weight:bold;font-size:19px"><span style="font-family:黑体">四、反思总结，内化提升</span></span></strong></p><p><br/></p>