Chrome，
QQ浏览器
-
-
-
-
-
-
-
播放：21 时间：2024-06-19简介： -
-
-
-
![全80集[2026最新版四年级数学]四年级系统数学思维课数学思维训练提升(讲义+配套习题)小学3~6年级学思维提升课全面系统精讲小学数学课](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F64b28c7fd0f5538e9ea7494b66f195c50a7fb69e.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
-
-
-
![全294集2026寒假提前学[北师大版四年级数学下册]北师大版四年级数学上册下册同步课堂+专项培优预习/复习精讲课堂(配套讲义作PDF)](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F4c13e1f7997e28d08289fe4c9844195a9becafd8.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
-
-
-
-
-
-
播放：9 时间：2025-10-02简介： -
-
-
-
-
-
-
-
![四年级[上] 用西游记打开数学之门 清华附小数学动画 北师大版 四年级[上]](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Fda058a3a455c3efd1a34cda515ca27e041a96b89.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
![全80集[2026最新版四年级数学]四年级系统数学思维课数学思维训练提升(讲义+配套习题)小学3~6年级学思维提升课全面系统精讲小学数学课](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F64b28c7fd0f5538e9ea7494b66f195c50a7fb69e.jpg%40672w_378h_1c_%21web-search-common-cover)
![全294集2026寒假提前学[北师大版四年级数学下册]北师大版四年级数学上册下册同步课堂+专项培优预习/复习精讲课堂(配套讲义作PDF)](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F4c13e1f7997e28d08289fe4c9844195a9becafd8.jpg%40672w_378h_1c_%21web-search-common-cover)
![四年级[上] 用西游记打开数学之门 清华附小数学动画 北师大版 四年级[上]](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Fda058a3a455c3efd1a34cda515ca27e041a96b89.jpg%40672w_378h_1c_%21web-search-common-cover)
.