学习数学通常做作业解题是一个必然要做的事情。出题与解题的方法千千万万,各有巧妙不同,但它有一个核心思想就是“变”。也就是把题目进行各种变化,做出合适的或不合适的结果来。怎样解题在外国有以玻利亚为代表的“猜想与解题模型”;在我国的浙江有过伯祥的“看、凑、化、代……”等十字诀,这些都离不开一个“变”字。从结论向已知变,从已知向结论变;从个别向一般变,从一般向特殊变;从某类 Learning mathematics is usually an inevitable task. There are thousands of ways to ask questions and solve problems, each with its own ingenious differences, but one of its core ideas is “change.” It is to make various changes to the topic and make appropriate or inappropriate results. How to solve problems in foreign countries has a model of “guessing and solving problems” represented by Bolivia; in China’s Zhejiang, there have been Bo Xiang’s “look, minato, change, generation...” and other cross-cuts. These are inseparable from these. A “change” word. From the conclusion to the known change, from the known to the conclusion; from the individual to the general, from the general to the special; from a certain class