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初中数学中的三个“一次”(一元一次方程(组)、一元一次不等式(组)、一次函数)是重要的基础知识,也是解决实际问题的有效工具之一.本文以2014年部分省市中考数学试题为例,进行归纳解析,供读者参考.一、一次方程(组)与一次不等式(组)型例1(益阳市)某电器超市销售每台进价分别为200元、170元的A、B两种型号的风扇,下表是近两周的销售情况:
Three “one” (one-time-one equations (group), one-dimensional inequality (group), one-time functions) in junior middle school mathematics are important basic knowledge and one of the effective tools to solve practical problems.In this paper, Provincial and municipal mathematics test questions, for example, for inductive analysis for readers reference .A first-order equation (group) and an inequality (group) Example 1 (Yiyang City) a supermarket sales per unit price was 200 yuan, 170 Yuan A, B two models of fans, the following table is the sales of the past two weeks: