在平时数学教学中,我们总不希望学生出一点差错.其实,错了有什么不好呢?虽然谁也不希望在解题中出错,但谁也不能幸免在解题中出错.解题出错是学习活动的正常现象.我在教学中常利用错例教学,针对学生常犯的一些错误, In the usual mathematics teaching, we don’t always want students to make a mistake. In fact, what’s wrong is wrong? Although no one wants to make a mistake in solving a question, no one can escape being mistaken in solving the problem. It is a normal phenomenon of learning activities. I often use wrong examples in teaching, aiming at some common mistakes made by students.