在数学学习过程中,我们常常会犯各种各样的错误,它可能是由于对数学概念的理解不准确产生的,也可能是由于数学方法运用不当而产生的,等等.分析自已和同学们学习过程中出现的错误及其产生的原因,可以更加准确地掌握数学概念,提高我们运用恰当的数学思想和方法解决问题的能力.笔者最近见到了很多同学认为似乎很“正确”的两个错误,写出来让同学们辨析,以起到 In mathematics learning, we often make a variety of mistakes, it may be due to inaccurate understanding of mathematical concepts may also be due to improper use of mathematical methods arising from, etc. Analysis of self and classmates Errors and their causes that arise during the learning process allow us to master mathematical concepts more accurately and improve our ability to use appropriate mathematical ideas and methods to solve problems. Recently, I have seen many students think it seems “correct”. Two mistakes, written out for students to distinguish, to play