2018年秋七年级数学上册第1章有理数1.1正数和负数(听课)课件(新版)新人教版.ppt

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第一章 有理数,1.1 正数和负数,知识目标,目标突破,第一章 有理数,总结反思,知识目标,1.1 正数和负数,1通过阅读资料、列举实例等活动,体会负数产生的过程,了解负数的概念,能识别正数和负数 2通过列举实际生活中各种数所表示的意义的活动,理解正数、零和负数的意义,会用正数和负数表示具有相反意义的量,1.1 正数和负数,目标一 会识别正数和负数,目标突破,B,1.1 正数和负数,1.1 正数和负数,目标二 会用正数和负数表示具有相反意义的量,B,1.1 正数和负数,1.1 正数和负数,1.1 正数和负数,1.1 正数和负数,总结反思,1.1 正数和负数,知识点一 正数的概念,0,知识点二 负数的概念,1.1 正数和负数,知识点三 零的意义,1.1 正数和负数,正数,负数,知识点四 用正数和负数表示具有相反意义的量,1.1 正数和负数,相反,1.1 正数和负数,1.1 正数和负数,

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