系统的封闭型数学问题已不能满足对我们能力的训练,更不能满足培养良好思维品质的需要,开放型问题随之产生,并直接进入各种考试中.开放型问题是相对于有明确条件和明确结论的封闭型问题而言的.试题知识覆盖面较大,综合性较强,再加上题意新颖,构思精巧,题目具有相当的深度和难度.它要求我们运用已学知识,通过观察、归纳、探索和 The closed mathematical problems of the system can no longer satisfy the training of our ability, but also can not meet the needs of training good thinking quality. Open-ended problems are generated and directly entered into various examinations. Open-ended problems are relative to having clear conditions and In terms of the closed-ended problems of clear conclusions, the knowledge of the questions covers a large area, and the comprehensiveness is relatively strong. In addition, the questions are novel, the ideas are delicate, and the questions have considerable depth and difficulty. It requires us to use the learned knowledge to observe, Induction, exploration and