教材中的数学问题一般都具有完整的结构，即适量的条件，唯一的答案，相对程式化的数量关系。教材中虽有一些开放题，但量不多，很难适应当前教改的需要。教师在备课中，如何创造性地将某些数学内容设计为开放性题呢？１．设计条件开放。传统的答题模式多数是条件与结论一一对 Mathematic problems in textbooks generally have a complete structure, that is, the amount of conditions, the only answer, the relative relationship between the number of programs. Although there are some open questions in the textbook, the amount is small and it is difficult to adapt to the current education reform. In lesson preparation, how to creatively design certain mathematical contents as open questions? 1. Design conditions are open. The traditional answer mode most of the conditions and conclusions of a pair