孔子曰:“学而不思则罔,思而不学则殆.”在解过数学题以后,要回过头来再思考,也就是解题后再思考,要把解题后再思考养成习惯,去发现、挖掘数学王国内未知的结论.下面我们从教科书上的一道例题入手进行研究,让大家领略解题后再思考的乐趣.例(人教版数学教科书七年级上册第67页例5)两船从同一港口同时出发反向而行,甲船顺水,乙船逆水,两船在静水中的速 Confucius said: “Learning without thinking is indiscriminate, thinking without learning is perilous.” "After solving math problems, we should go back and think again, that is, after solving problems, we should think about solving problems Develop habits, to discover and tap the unknown conclusion of the king of mathematics. Let’s start with a case study on the textbook to make everyone enjoy the fun of solving the problem after thinking. (PEP Edition 7, Volume 67 Page 5) Both ships depart from the same port at the same time in the opposite direction. A boat goes down the water and the B boat goes against the water. The speed of the two boats in still water