打开App
360P
一桶油连桶重15千克，吃了一半油后，连桶重8千克，问油桶各重？
小学数学典型题+易错题+思维提高题216/233
App02:20
App02:25
App03:05
App03:11
App03:37
App01:16
App02:10
App01:32
App01:39
App01:46
App01:58
App01:40
App02:18
App01:23
App02:45
App01:45
App01:32
App03:03
App01:40打开App观看
