<h3>一、计算我能行！</h3><h3>1.列竖式计算</h3><h3> 10.56×0.38= 42÷11=</h3><h3> 2.简便运算</h3><h3> 3.56×99= 1.25×32×0.25=</h3><h3> 0.48÷6÷8= 0.56×90+5.6=</h3><h3>3.解方程（检验第2个）</h3><h3> 3x—1.5=7.8 15.6÷x=2</h3><h3><br></h3> <h1 style="max-width: 100%; clear: both; min-height: 1em; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">今天给大家讲一讲</span><span style="font-size: 14px;">小学数学中的</span></h1><h1 style="max-width: 100%; clear: both; min-height: 1em; text-align: center; overflow-wrap: break-word !important;"><span style="font-size: 14px;"></span><strong style="color: rgb(171, 5, 5); font-size: 15px; max-width: 100%; overflow-wrap: break-word !important;">数形结合思想</strong></h1></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"> 我国<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">著名数学家华罗庚</strong></span>对“数”与“形”之间的密切联系有过一段精彩的描述。“数与形本是相依，焉能分作两边飞，数缺形少直觉，形少数难入微，数形结合百般好，隔裂分家万事休，切莫忘，几何代数统一体，永远联系切莫分离。” 寥寥数语，把“数形结合”之妙说得淋漓尽致。</h3></section> <p style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; white-space: normal; color: rgb(51, 51, 51); max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"> 数形结合思想的实质即<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">通过数形之间的相互转化，把抽象的数量关系，通过理想化抽象的方法，转化为适当的几何图形</strong></span>，从图形的结构直观地发现数量之间存在的内在联系，解决数量关系的数学问题。</h3><h1 style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; white-space: normal; max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><font color="#167efb"> </font><font color="#010101">———</font><b style=""><font color="#ff8a00">数形结合思想的例子</font><font color="#010101">———</font></b></h1><h1 style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; white-space: normal; max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><font color="#167efb"><b></b></font> 我们小学阶段最常使用到数形结合思想的板块主要有<span style="font-size: 17px; max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 15px; overflow-wrap: break-word !important;">和差、和倍、差倍问题、年龄问题、还原问题、行程问题等</span></strong></span><span style="color: rgb(51, 51, 51); font-size: 17px;">，所以掌握了数形结合这个技能之后，这些板块基本就不在话下。</span></h1><div style=""><p style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; white-space: normal; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">下面举例说明：</strong></h3></div></section> <h3><font color="#ff8a00">例一：差倍问题</font></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【问题】</strong></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="max-width: 100%; overflow-wrap: break-word !important;">两块同样长的花布，第一块卖出31米，第二块卖出19米后，第二块是第一块的4倍，<strong style="max-width: 100%; overflow-wrap: break-word !important;">求每块花布原有多少米？</strong></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;">【解析】</span></strong></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;">先画示意图如下</h3> <p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">由图可以看出<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">三份对应的是</strong></span>：31-19＝12（米）</h3><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">所以<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">第一块布剩下的是</strong></span>：12÷（4-1）=4（米）</h3><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">第一块布原有：4+31=35（米）（两块布原有长度相等）。</h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><font color="#ff8a00">例二：年龄问题</font></h3><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【问题】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">叔叔和小强聊天，叔叔说：“当我跟你一样大时，你才2岁；当你像我这样大时，我已经38岁了。”<strong style="max-width: 100%; overflow-wrap: break-word !important;">求叔叔的年龄。</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【解析】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">先画示意图如下：</h3></section></section> <h3><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">由图可知2岁加上三个年龄差后就变成了38岁，所以</span><span style="max-width: 100%; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">小强和叔叔的年龄差</strong></span><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">就是：（38-2）÷4=9（岁），叔叔的年龄：38-9=29（岁）</span><br></h3> <p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><font color="#ff8a00">例三：还原问题</font></strong></h3><p style="color: rgb(171, 5, 5); max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【问题】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">小丽用4元买了一本《童话大王》，又用剩下的钱的一半买了一本《儿童时代》，买钢笔又用去第二次剩下的钱的一半多1元，最后还剩4元，<strong style="max-width: 100%; overflow-wrap: break-word !important;">问：小丽原有多少钱？</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【解析】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">先画示意图如下：</h3></section> <h3><font color="#010101"><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">第一次剩下的一半：（1+4）×2=10（元）</h3><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">原有：10×2+4=24（元）</h3></section></font></h3> <h3><font color="#ff8a00">例四：行程问题</font></h3><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【问题】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">甲、乙、丙三人，甲每分钟走100米，乙每分钟走80米，丙每分钟走75米。甲从东村，乙、丙从西村同时出发相向而行，途中甲、乙相遇后3分钟又与丙相遇。<strong style="max-width: 100%; overflow-wrap: break-word !important;">求东西两村的距离。</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">【解析】</strong></h3></section><p style="max-width: 100%; clear: both; min-height: 1em; overflow-wrap: break-word !important;">先画示意图如下：</h3></section> <h3><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">甲、乙相遇后3分钟，甲、丙相遇。</span><span style="max-width: 100%; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">甲、丙在3分钟内共走路程是</strong></span><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">（100+75）×3=525 (米)。显然，这就是甲、乙相遇时，</span><span style="max-width: 100%; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">乙比丙多走的路程</strong></span><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">，</span><span style="max-width: 100%; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">乙比丙每分钟多走</strong></span><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">80-75=5 (米)。所以，甲、乙相遇时离出发的时间是525÷5=105 (分钟)。两村间的距离是：（100+80）×105=18900 (米)。</span><br></h3><h1><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;"><font color="#333333">——</font><font color="#ff8a00"><b>【数形结合思想的重要性】</b></font><font color="#333333">——</font></span></h1><h3><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;">数形结合是连接“数”与“形”的“桥”，它</span><span style="max-width: 100%; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">不仅作为一种解题方法，还是一种重要的数学思想。</strong></span><span style="font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal;"><font color="#333333"><br></font></span></h3> <p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"> 在小学数学教学中，数形结合能不失时机地为学生提供恰当的形象材料，可以将抽象的数量关系具体化，把无形的解题思路形象化，<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">不仅有利于学生顺利的、高效率的学好数学知识，更有利于学生学习兴趣的培养、智力的开发、能力的增强，使教学收到事半功倍之效</strong></span>。</h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"> 最关键一点，能<span style="max-width: 100%; color: rgb(171, 5, 5); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">使抽象枯燥的数学知识，形象化、具体化</strong></span>，使得数学学习充满乐趣。</h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><b style=""><font color="#ed2308">三、课后作业：</font></b></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="font-size: 20.94px; letter-spacing: 2.61px; font-family: 微软雅黑; text-indent: 41.88px;">1.甲自行车每小时行15千米，乙自行车每小时行12千米。乙先行1.5小时，问几</span><span style="font-family: 微软雅黑; font-size: 20.94px; letter-spacing: 2.61px; text-indent: 41.88px;">小时后甲可追上乙？（用两种方法解答）</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="font-family: 微软雅黑; font-size: 20.94px; letter-spacing: 2.61px; text-indent: 41.88px;"><br></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="font-family: 微软雅黑; font-size: 20.94px; letter-spacing: 2.61px; text-indent: 41.88px;">2.</span><span class="rtcscls2_r_2 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">一篮鸡蛋，第一次拿走整篮鸡蛋的</span><span class="rtcscls2_r_2 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">，第二次又拿走剩下的</span><span class="rtcscls2_r_2 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">，最后篮子里还有</span><span class="rtcscls2_r_4 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">4</span><span class="rtcscls2_r_2 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">个鸡蛋。你知道原来这个篮子里有几个鸡蛋吗</span><span class="rtcscls2_r_4 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">?</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span class="rtcscls2_r_4 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;"><br></span></h3><h1 style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span class="rtcscls2_r_4 fszl_show" style="outline-style: initial; outline-width: 0px; -webkit-tap-highlight-color: transparent; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 18px; line-height: inherit; font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; vertical-align: inherit;">3.</span><span style="font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; font-size: 18px;">儿子陪爸爸聊天，爸爸说：“当我像你这么大时，你才15岁呢!”儿子说：“当我像爸爸这么大的时候，爸爸就75岁啦!”那么儿子今年几岁？</span></h1><h1 style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; font-size: 18px;"></span><span style="font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; font-size: 18px;"><br></span><span style="font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; font-size: 18px;">4.</span><b><span style="color: rgb(52, 52, 52); font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif; font-size: 15px; text-indent: 55px;">一个长方形长增加1.5米,或宽增加1.2米,面积都增加6平方米,求原长方形的面积。</span><span style="color: rgb(52, 52, 52); font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif; font-size: 15px; text-indent: 55px;"> </span><span style="color: rgb(52, 52, 52); font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif; font-size: 15px; text-indent: 55px; white-space: normal;"> </span></b></h1><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="font-family: "PT Serif", "Droid Serif", "Times New Roman", arial, sans-serif; font-size: 18px;"></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 14px; letter-spacing: 2.5px; text-align: justify; white-space: normal; overflow-wrap: break-word !important;"><span style="color: rgb(52, 52, 52); font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif; font-size: 15px; text-indent: 55px; white-space: normal;"></span></h3><p style="font-family: -apple-system, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", STHeiti, "Microsoft YaHei", "Microsoft JhengHei", "Source Han Sans SC", SimSun, sans-serif; font-size: 16.8px; border: 0px; line-height: 34.91px; letter-spacing: 2.61px; white-space: normal; margin-bottom: 10px !important; text-indent: 2em !important;"><span style="font-family: 微软雅黑; font-size: 20.94px; border: 0px; vertical-align: baseline; word-break: break-word;"></span></h3> <h1 style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 16px; letter-spacing: 2.5px; white-space: normal; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">通过今天数形结合思想的再次学习<br></span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">大家有没有都掌握呢？<br></span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">没有的话一定要加强联系啦！<br></span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">毕竟数形结合思想<br></span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">对于小学数学来说真的很重要</span></h1>