平面几何计算题在教材中所占的比例不大,因此计算题的失根问题并没有引起有些老师的重视,但笔者发现,近年来中考或竞赛试题中时常出现计算题,学生对这类题目的得分率并不高,往往出现失根。下面给出数例,剖析其失根原因,供参考。 The proportion of plane geometry calculation questions in the teaching materials is not large, so the problem of the roots of calculation problems did not cause some teachers to pay attention, but the author found that in recent years, the calculation questions have often appeared in the examination or contest examination questions, students have such questions The score rate is not high, and it often leads to dislocation. A few examples are given below to analyze the causes of root loss for reference.