打开App
360P
奥数天天练，列方程解工程问题有窍门，学霸这样设未知数轻松搞定
10-4列方程解应用题：某项工程原计划用52人可按预定的期限完成任务，后来采用新技术使得工作效率提高50%，因此少派了12人，结果还提前了6天完成任务，那么如果要提前5天完成，需要派多少人？
小学奥数提分天天练35/65
App02:39
App04:13
App01:36
App01:15
App02:23
App01:44
App02:34
App02:40
App01:20
App01:07
App01:17
App01:17
App01:37
App03:44
App01:08
App01:41
App02:21
App01:25
App03:01
App05:03
App02:25
App02:24
App00:58
App00:55
App01:22
App01:25
App00:43
App01:02
App01:49
App03:34
App02:10打开App观看
