吴正宪《分数的初步认识》示范课

《分数的初步认识》三年级 吴正宪1

https://v.qq.com/txp/iframe/player.html?vid=h0529iaoy7t&width=500&height=375&auto=0

《分数的初步认识》三年级 吴正宪2

https://v.qq.com/txp/iframe/player.html?vid=a0529esojux&width=500&height=375&auto=0

《分数的初步认识》三年级 吴正宪3

https://v.qq.com/txp/iframe/player.html?vid=t0529sfkdi8&width=500&height=375&auto=0