一、小老师介绍
大家好！我是南山区文理实验学校三（1）班的王子锐。我是一个好学好问的男孩子，平时喜欢看书，乒乓球，篮球是我擅长的运动，我也非常喜欢数学。
我的数学学习宣言：计算让未来更精彩！
二、说题过程
23号题
一张长方形彩纸长48厘米，宽5厘米。从这张材质上裁剪边长为5厘米的正方形，最多可以裁剪多少张正方形彩纸？剩下彩纸的周长是多少厘米？
三、讲解视频：
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p;amp;amp;amp;amp;amp;amp;lt;/mpchecktextamp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;mpchecktextid=amp;amp;amp;amp;amp;amp;amp;amp;quot;9_0.amp;amp;amp;amp;amp;amp;amp;amp;quot;contenteditable=amp;amp;amp;amp;amp;amp;amp;amp;quot;falseamp;amp;amp;amp;amp;amp;amp;amp;quot;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;/mpchecktextamp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;四、讲解文稿：
我们先划出关键词：长方形的长48厘米、宽5厘米、边长为5厘米的正方形、最多、剩下。
解题思路：
总长48厘米如下图所示，用除法48除以5等于9余3厘米，所以可以裁剪9个正方形。周长为两边之和乘以2，所以等于8厘米（5厘米加3厘米）乘以2等于16厘米。
第一步：最多可以剪正方形彩纸的数量：48÷5=9(个)…..3(cm)
第二步：剩下彩纸的周长为：（5+3）x2=8x2=16（cm）
答：最多可以剪9个正方形，剩下彩纸的周长是16厘米。
我的讲解完毕，谢谢大家！
图文：王子锐、王子锐家长
审核：王思勤爸爸、徐旭妈妈
校对：王子锐妈妈
发布：王琳霏妈妈
转载请注明：http://www.budanx.com/xwzsp/5031.html
