打开App
360P
一年级数学下册《十几减九》破十法、平十法讲解【停课不停学】
破十法是拆分被减数，平时法是拆分减数
一年级数学下册11/22
App05:59
App03:16
App02:18
App04:11
App04:21
App03:29
App03:20
App03:47
App03:03
App05:19
App07:01
App06:23
App02:13
App03:41
App02:16
App02:58
App02:04
App02:17
App04:07
App04:21
App01:27
App02:15打开App观看
