Chrome，
QQ浏览器
.
![全294集2025版新课提前学【北师大版四年级数学上册]北师大版四年级数学同步课堂+专项培优 暑假预习/复习精讲课堂(配套讲义习作 PDF)](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F0252ea4529f58988f5ba953784e010dbbb189b88.jpg%40672w_378h_1c_%21web-search-common-cover)
，知识点紧扣教材，步骤清晰易理解，助力孩子夯实数学基础，提升解题能力～](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F0599c68c8da198e998806e56a9db8d130572ddf5.jpg%40672w_378h_1c_%21web-search-common-cover)
.