1分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056348

2分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056391

3分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056475

4分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056402

5分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056466

6分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056514

7分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056482

8分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056459

9分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056641

分数的初步认识 - 牛娃课堂.mp4: https://72k.us/file/4285902-427056871

分数的初步认识视频描述.docx: https://72k.us/file/4285902-427056487