ile:第5课《分数加法和减法》异分母分数加减混合.flv file:第4课《分数的意义和性质》分数与小数的互化.flv file:第7课《解决问题的策略》转化（2）.flv file:第1课《简易方程》列方程解应用题（1）.flv file:第3课《因数与倍数》因数与倍数.flv file:第6课《圆》整理复习.flv file:课时05.单式折线统计图.flv file:课时03.实际问题与方程（一）.flv file:课时21.异分母分数加减法.flv file:课时24.圆的认识.flv file:课时16.真分数和假分数.flv file:课时08.2、5的倍数特征.flv file:课时29.转化策略解决问题.mp4