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六年级数学下册第一单元《负数》课件新人教版.ppt

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负数（一）,新课导入,1.什么是负数？你接触过负数吗？,2.什么地方你见到过负数？,3.负数是怎么样的数呢？,小朋友，你会写吗？,说说这节课你学到了什么？,再见!,

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