在分数应用题中,有一类隐含不变量的题目,数量关系变化多样,解题方法比较多,但一般解法思路比较繁琐,给学生解题带来一定的困难。教师在教学中注意对学生进行创新思维训练,不但能拓展解题思路、沟通不同题型之间的联系,而且能探寻出思路单一 Among the fractional application questions, there is a class of topics that imply invariants, the number of relationships varies and the number of problem solving methods is relatively large. However, the general solution is a bit tedious task, posing some difficulties for students to solve problems. Teachers in teaching pay attention to students’ innovative thinking and training, not only can expand the problem-solving ideas, communication between different types of questions, but also to explore a single idea