一、内容和内容解析1.内容建立方程模型解决销售中的盈亏问题.2.内容解析随着市场经济的发展,经营活动越来越被人们重视.数学教学适当结合这方面问题,可以增加学生的经济知识和经营意识.乍看这个问题时,因为两件衣服的售出价格相同,其中一件盈利25%,另一件亏损25%,所以容易感觉“总的结果是不盈不亏”.但是经过用一元一次方程进一步探究,可知总的结果是亏损.这说明:直觉有时并不可靠,正确运用数学知识分析问题可以减少判 First, the content and content analysis 1 content to establish the equation model to solve the problem of sales profit and loss .2 content analysis With the development of market economy, business activities more and more attention .Mathematics teaching appropriate combination of these issues, can increase students At first glance, this is easy to feel because the selling price of the two pieces of clothing is the same, 25% for one and 25% for the other. "The overall result is not profit or loss However, after further exploration with a one-dollar equation, we can see that the total result is a loss, which shows that intuition is not always reliable and correct use of mathematical knowledge can reduce the number of sentences