Chrome，
QQ浏览器
.
![全405集【2024四年级上册数学动画]四年级上下册同步课堂人教版数学1-6年级全405集](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F09f6925fc3f711d38d8cf68724085960e1ff2bef.png%40672w_378h_1c_%21web-search-common-cover)
![人教版小学数学四年级下册2023最新人教版版数学动画教学课件包含PDF课件习题【全199集]](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F34bb593771b3994f8a83fb8683e9235a11bb02e2.jpg%40672w_378h_1c_%21web-search-common-cover)
.