1引言概率、统计是中学数学教学研究中相对薄弱的一部分,要加强对这方面的研究~([1])。以向量坐标为载体,促进对统计相关知识的理解,沟通了随机性数学与确定性数学之间的内在关联,在学习心理及教学上具有重要意义。本文以一个“小切口”探讨这个大问题。2理解在平面直角坐标系中,设向量 1 Introduction Probability and statistics are relatively weak parts of secondary school mathematics teaching and research, to strengthen research in this area ~ ([1]). Vector coordinates as a carrier, to promote the understanding of statistical knowledge, communication between random mathematics and deterministic mathematics, the intrinsic correlation between the psychology and teaching is of great significance. This article uses a “small incision” to explore this big problem. 2 Understand In Cartesian coordinate system, set the vector