三年级小朋友讲解一道较复杂的竖式之谜问题,对竖式另一种理解!
App01:20
App07:41
App03:24
App01:32
App04:15
App01:18
App02:19
App00:44
App03:55
App03:02
App03:09
App03:50
App02:15
App02:23
App05:04
App02:35
App02:08
App03:15
App07:41
App07:00
App03:02
App02:34
App02:38
App06:57
App05:22
App02:41
App03:11
App01:34
App03:29
App05:13
App04:15