编拟数学题是每一个数学教师经常遇到的问题,编拟数学题应该遵循一条起码的原则:题目的已知条件是其结论成立的充分条件。在教学实践中,有的教师或许由于任务重、时间紧,或许由于临时命题、信手摘抄,或许由于一时疏忽、考虑欠周,致使编拟的练习题、思考题、乃至考试题中,出现一些违背上述基本原则的失误。在一些指导中学数学教学的期刊、资料,甚至教科书中,有时也难免出现此类失误。下面摘录几 The preparation of mathematics questions is a problem that every mathematics teacher often encounters. A minimum principle should be followed when preparing mathematics questions: The known condition of a topic is a sufficient condition for its conclusion to be established. In the teaching practice, some teachers may be due to heavy tasks, tight schedules, perhaps due to temporary propositions, letter excerpts, perhaps due to a moment of negligence, consider the lack of weeks, resulting in the preparation of exercises, thinking questions, and even exam questions, there are some Violations of the above basic principles. In some journals, materials, and even textbooks that teach mathematics teaching in middle schools, it is sometimes difficult to avoid such mistakes. Excerpts below