中学数学解题常见致错原因及对策研究——以“差比数列”求和为例

A Discussion on the Common Causes of Mistakes in Mathematic Problem Solving in Middle Schools——A Case Study of Difference Ratio Sequence of Number Summation

文章总结了中学生用错位相减法求差比数列前n项和的常见错误,并对错因进行了分析,最后提出应对策略,从而解决学生的困惑,达到提高教学实效性的目的。

This article summarizes the common mistakes made by students in middle schools when calculating the number summation of difference ratio sequence of number from 1 to n with the method of transplacement subtraction. It also analyzes the causes of the mistakes and provide some solutions so as to improve the effi- ciency of mathematics teaching.