同学们,你们知道吗?在日常生活中,类似植树、种花的棵数这样的问题是最简单、最基本的“植树问题”。此外,还有许多问题可以借助“植树问题”的思考方法来解决,就看你的火眼金睛能不能辨别了。十月一日,欣欣一家外出旅游。在高速公路上,却遇到了路面施工。车流缓慢地移动着,妈妈指着施工处的信号灯对欣欣说:“你看,信号灯闪5下用了20秒。那30秒最多闪几下呀?” Students, do you know? In everyday life, the problem of planting trees and planting flowers is the simplest and most basic problem of planting trees. In addition, there are many problems that can be solved with the help of “planting problems” thinking, to see your eyes and eyes can not tell. On October 1, Shin Shin a travel. On the highway, but encountered pavement construction. The traffic flow slowly moving, the mother pointed to the construction department of the lights on Showtime said: "You see, the lights flash for 5 seconds with 20 seconds.