线段图具有形象、直观的优点,便于分析应用题中包含的数量关系,进而发现已知量与未知量的联系。在简单应用题教学时,学生已熟悉了各种类型的简单线段图,在复合应用题的教学中,只要我们善于把复合应用题分解成几个简单应用题,并借助于线段图的分析,就能突破复合应用题教学这一难点,收到较好的效果。 Line segment image has the advantages of visual, intuitive, easy to analyze the relationship between the number of questions contained in the application, and then find the amount of known and unknown links. In the simple application problem teaching, the students are familiar with all kinds of simple line drawings. In the teaching of composite application questions, as long as we are good at decomposing the composite application questions into several simple application questions and by using the analysis of the line segment diagrams, You can break through the difficult problem of composite application problem teaching, received good results.