平均值不仅是数学名词,物理学也经常用到,但是平均值的应用往往有些前提条件容易被学生忽略,进而出现滥用现象,笔者通过教学效果的总结发现一些常见问题,希望能引起教学同仁的重视.在高中阶段我们经常采用平均值的方法来解决一些复杂问题,比如在学习到匀变速直线运动时,知道速度与时间的关系式,例如:v=3+2t(其中v,t是国际单位制中的数值),则要求0~2 s时间内的位移,其基本方法是由vt=v0+at得v0=3 The average is not only a mathematical term, physics is also often used, but the average value of the application of some preconditions tend to be ignored by students, and then abuse, the author found some common problems through the summary of teaching results, hoping to arouse the teaching colleagues At the high school stage, we often use the average method to solve some complex problems. For example, when learning the uniform linear motion, we know the relationship between speed and time. For example, v = 3 + 2t (where v, t is the international The value of the unit system), then requires 0 ~ 2 s displacement within the time, the basic method is vt = v0 + at v0 = 3