5数下：分数和小数的互化

https://v.qq.com/txp/iframe/player.html?vid=f0524ayf3a5&width=500&height=375&auto=0

https://v.qq.com/txp/iframe/player.html?vid=p0188jb4vks&width=500&height=375&auto=0

复制打开网址 www.1ydt.com 下载完整全册word教案试卷及PPT课件点击阅读原文看全部教学内容

https://v.qq.com/txp/iframe/player.html?vid=g0182x8bq7k&width=500&height=375&auto=0