2018年秋七年级数学上册第2章整式的加减2.1整式第2课时单项式(预习)课件(新版)新人教版.ppt

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第二章 整式的加减,2.1 整式,第二章 整式的加减,第2课时 单项式,第2课时 单项式,探究新知,活动1 知识准备,小玲买了8本单价为n元的笔记本,共花了_元,8n,第2课时 单项式,活动2 教材导学,单项式 (1)一辆汽车以60千米/小时的速度行驶了c千米,则这辆汽车的行驶时间为_小时; (2)长方形的长为m,宽为n,则两个这样的长方形的面积为_; (3)电冰箱的包装箱是长方体,如果包装箱的底面形状是边长为a米的正方形,包装箱的高为b米,那么它的体积是_立方米;,2mn,第2课时 单项式,(4)x的立方的相反数是_ 以上的式子有什么共同特点? .,答案 都是数与字母或字母与字母的积,

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