画线段图是人们解答数学题时常用的一种分析方法,它能把数学问题中的数量关系用线段图的形式展现出来,然后对照图形进行思考,使复杂的问题变得简单,从而快速地找到解题的思路。【题目】放学后,乐乐从学校往家走,已经走的路程是未走的1/4,再走120米,正好走了全程的40%,这条路全程多少米? Drawing line art is a common analytical method used to solve mathematical problems. It can show the relationship between the number of mathematical problems in the form of line segments, and then reflect on the figures so as to make the complicated problems easier and quicker Find a solution to the problem. 【Subject】 After school, Lele go from home to school, has gone the distance is not go 1/4, then go 120 meters, just go 40% of the whole journey, how many meters this road?