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数学应用题当中与生活息息相关的商品销售问题出现的频率是相当多的,而销售问题一般都涉及单价与销量,根据我们的实际生活经验,商品的价格往往能影响到销量的变化,反过来销量的变化也会使商家做出价格的调整,单价与销量之间存在着某种联系。而通常情况下,单价上涨,销量就会下降;反之,单价下降,销量就会上涨。所以有关单价与销量变化的一类问题就出现了,这里问题都涉及这样的字眼:单价每降低(或升高)a元,销售量就增加(或减少)b件,这类问题的叙述方式比较固定,解题方法
The frequency of commodity sales issues that are closely related to life in mathematics applications is quite numerous, and sales issues generally involve unit prices and sales. According to our actual life experience, the prices of commodities can often affect sales volume changes, and in turn sales The changes will also enable the merchant to make price adjustments. There is a link between unit price and sales volume. Under normal circumstances, if the unit price rises, the sales volume will decline. On the contrary, if the unit price decreases, the sales volume will increase. So a question arises concerning the change in unit price and sales volume. The questions here are all related to the following: When the unit price decreases (or increases) a yuan, the sales volume increases (or decreases) by b. More fixed, problem solving method