论文部分内容阅读
列不等式(组)解决生活中的实际问题,是近年中考命题的一个热点。这类题型既能考查学生的知识掌握程度,又能考查学生运用数学知识解决实际问题的能力。列不等式(组)解决生活中实际问题的基本思路是建立不等式模型,再运用不等式的性质加以解决,能否在实际问题中准确的找到不等式关系, 建立数学模型,是解决问题的关键。下面举例说明如何建立不等式模型。
Column inequality (group) to solve the practical problems in life, is a hot topic of the prose test in recent years. This type of question can not only examine the level of knowledge of students, but also examine students’ ability to use mathematics knowledge to solve practical problems. The basic idea of listing inequalities (groups) to solve practical problems in life is to establish inequality models, and then use the nature of inequalities to solve them, whether it is possible to find inequalities accurately in practical problems, and to establish mathematical models is the key to solving problems. The following example illustrates how to build an inequality model.