河南省郑州市中牟县雁鸣湖镇七年级数学下册第一章整式的乘除1.7整式的除法(1)教案(新版)新人教版.doc

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1、1第一章:整式的乘除课 题 1.7 整式的除法(1) 课时安排 共( 2 )课时课程标准 课程标准 28 页学习目标1探究单项式除以单项式的运算规律;2能运用单项式除以单项式进行计算并解决问题教学重点 探究单项式除以单项式的运算规律;教学难点 能运用单项式除以单项式进行计算并解决问题教学方法 尝试归纳法教学准备 制作教学课件课前作业 预习课本并尝试完成随堂练习教学过程教学环节 课堂合作交流二次备 课(修改人: )2一 、情境导入填空:(1)aman_;(2)( am)n_;(3)am nan_;(4) amnan_我们已经学习了单项式乘以单项式的运算,今天我们将要学习它的逆运算环节 一课中作业

2、 22)1()(xy二、合作探究探究点:单项式除以单 项式【类型一】 直接用单项式除以单项式进行计算计算:(1) x5y13( xy8);(2)48 a6b5c(24ab4)( a5b2)56解若 a(xmy4)3(3x2yn)24 x2y2,求 a、 m、 n 的值解析:利用积的乘方的计算法则以及整式 的除法运算得出即可解: a(xmy4)3(3x2yn)24 x2y2, ax3my129x4y2n4 x2y2, a94,3 m42,122 n2,解得 a36, m2, n5.方法总结:熟练掌握积的乘方的计算法则以及整式的除法运算是解题关键变式训练:见学练优本课时练习“课后巩固提升”第 2

3、题【类型三】 整式除法的实际应用光的速度约为 3108米/秒,一颗人造地球卫星的速度 是8103米/秒,则光的 速度是这颗人造地球卫星速度的多少倍?解析:要求光速是人造地球卫星的速度的倍数,用光速除以人造地球卫星的速度,可转化 为单项式相除问题解:(310 8)(8103)(38)(1 08103)3.7510 4.答:光速是这颗人造地球卫星速度的 3.75104倍方法总结:解整式除法的实际应用题时,应分清何为除式,何为被除式,然后应当单项式除以单项式法则计算环节二课中作业变式训练:见本课时练习“课堂达标训练”第 11 题3(修 改人: )课后作业设计: 课后习题 练习册板 书设计:1单项式除以单项式的运算法则:单项式相除,把系数、同底数幂分别相除,作为商的因式;对于 只在被除式里含有的字母,则连同它的指数作为商的一个因式2单项式除以单项式的应用教学反思:

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