在数学教學中,由于过去較长时期以来,不論在教师的思想上或者教学的方法上,多是祇注意解題的技巧,而忽視合理正确的运算,因此也形成学生在学习上只知道钻难求深、不习慣数字計算的偏向,这样日积月累,学生在数学知識方面,便产生了一定的缺陷。我們在教学过程中,就发現高一有些學生在习題中遇到計算18×25这类情况时,需要用監式演草。化4次根式与6次根式为同次根式时得出了24次根式。 In mathematics teaching, because in the past a long period of time, regardless of the teacher’s ideology or teaching methods, most of them are only paying attention to the problem-solving skills and ignoring reasonable and correct calculations. As a result, students are only learning to drill hard. Deepening and not being accustomed to the bias of numerical calculations have led to certain defects in students’ knowledge of mathematics. During the teaching process, we found that some students in senior grades need to use the monitor type to perform exercises when they encounter such situations as calculating 18×25 in their exercises. When the roots of the fourth order and the order of the sixth order were the same roots, the 24 order roots were obtained.