Chrome，
QQ浏览器
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![全196集2025新课提前学【四年级数学上册/下册]人教版四年级数学上下册同步课堂+专项培优精讲课堂(配套讲义习作 PDF)](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F912b472356823368a4b7562b3c20f9541587999c.jpg%40672w_378h_1c_%21web-search-common-cover)
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![[全294集]2025暑假必看【北师大版小学数学 四年级数学上册/下册数学]四年级上册数学课本同 步+专项培优精讲课堂视频配套讲义习题PDF](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2Fdefbf3bb1838535ed565afefc810568ff5889148.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：17 时间：2024-06-21简介： -
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![全196集2025新课提前学【四年级数学上册/下册]人教版四年级数学上下册同步课堂+专项培优精讲课堂(配套讲义习作 PDF)](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F912b472356823368a4b7562b3c20f9541587999c.jpg%40672w_378h_1c_%21web-search-common-cover)
![[全294集]2025暑假必看【北师大版小学数学 四年级数学上册/下册数学]四年级上册数学课本同 步+专项培优精讲课堂视频配套讲义习题PDF](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2Fdefbf3bb1838535ed565afefc810568ff5889148.jpg%40672w_378h_1c_%21web-search-common-cover)
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