在小学低年级数学教学中,有关“求比……多(少)的应用题教学是一个难点.如果不突破这个难点,势必会给以后的有关复合应用题教学带来困难.由于低年级儿重知识面窄,理解能力差,教师只能采取以实例反复对照、比较的方法,去引导学生从感性到理性建立起差数比的概念,明确比的标准,从而揭示较大数、较小数和相差数田本质特征及其联系与区别.但低年级学生毕竟年龄小,往往弄不清是谁比谁,把握不住谁大谁小,知谁来谁,因而很容易陷入“多加少减”的窠臼.如果能找到一个类似“公式”的标准让学生去理解、掌握、运用,那么学生操作起来就会简便得多. In the lower grades of primary school mathematics teaching, the teaching of “more than ... more (less) problem-solving application is a difficult, if you do not break through this difficulty, will inevitably give future teaching on the problem of composite applications problems. Knowledge of the narrow surface, the ability to understand poor, teachers can only take a case-by-case comparison and comparison method to guide students from perceptual to rational to establish the concept of difference ratio, clear than the standard, so as to reveal a larger number, smaller Number and the difference between the number of Tian field and its characteristics and contact with the difference.But junior high school after all age is young, often can not figure out who is better than who, who can not grasp who is small, who knows who is easy to fall into ”more and less If you can find a similar “formula” standard for students to understand, master, use, then students will be much easier to operate.