【最新】2022年中考数学试题评价与分析.docx

2022年中考数学试题评价与分析
County continuation records has examined and approved the draft, spirit, believe, comprehensivhas examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work4
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work
。
【试题评析】此题考查统计特征量的概念。

A. B. C. D.
【答案】C
【解题思路】因为，，，
【试题评析】此题考查整式的运算根本法那么，包括同底数幂的乘法、幂的乘方、积的乘方和完全乘法公式。
第6题图
，线段AB的两个端点的坐标分别为A(6，6)，B(8，2)，以原O为位似中心，在第一象限将线段AB缩小为原来的后得到线段CD，那么端点C的坐标为
A.〔3，3〕 B. 〔4，3〕
C.〔3，1〕 D. 〔4，1〕
【答案】A
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work6
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared draft, entered the phase of evaluation. Civil air defense work
【解题思路】在以坐标原点为位似中心的坐标变换中，假设原图形上点的坐标为〔x,y〕,变换后的图形与原图形的位似比为k,那么变换后图形对应点的坐标为〔kx,ky〕(同侧变换)或〔-kx-,ky〕(异侧变换)。
【试题评析】此题考查位似变换中对应点坐标之间的变化关系。
第7题图
正面
7. 如图，是由4个大小相同的正方体组合而成的几何体，其俯视图是
A. B. C. D.
County continuation records has examined and approved the draft, spirit, believe, comprehensive Yearbook of zhuanglang already prepared