数学家波利亚在《怎样解题》中说过:“没有任何一个题目是彻底完成的。”这句话说明数学解题没有终点,即使得到题目的答案,仍要对题目进行回顾反思,如追问“还有其他方法吗?”若现阶段没有,也不能轻易画上句号,也许在后续的认知中会有新的方法。人教版《义务教育教科书·数学》八年级上册中有这样一道典型题目,在同一学期的四个不同学习时段, Polya, a mathematician, said in “How to Solve Problems”: “There is no one subject that is completely finished.” This sentence shows that there is no end to the mathematical problems, even if the answer to the questions is still to be reviewed Reflections, such as asking “Is there any other way?” If there is no such thing at this stage, it can not be easily end-of-sentence, and there may be new ways in the subsequent cognition. People’s Education Edition “compulsory education textbooks · Mathematics” in the eighth grade there is such a typical topic, in the same semester of four different study periods,