应用题是小学数学教学中的重要内容,也是一大难点。尤其是复合应用题,结构复杂,数量关系隐蔽,选择算法要经过比较复杂的分析推理判断。因此,历来是重要的研究课题。但是,复合应用题教学始终存在着一些弊病,教学质量不高, Application questions is an important part of primary school mathematics teaching, but also a major difficulty. In particular, composite application questions, the structure is complex, the relationship between the number of covert, the selection algorithm to go through more complex analytical reasoning. Therefore, it has always been an important research topic. However, there are always some drawbacks in the teaching of composite application problems, the quality of teaching is not high,