学生在小学对不等量关系、数量大小的比较等知识已有所了解,但对含未知数的不等式还是第一次接触。本节就是对“不等式”这一概念进一步明确,使之成为一种有效的数学工具。学生在列不等式时,对“不大于”“不小于”“负数”、“非负数”等的含义不能理解,把用文字语言表述的不等关系转化为用符号表示的不等关系有一定困难,对不等式的解、不等式的 Students in the primary school of unequal relations, the number of the size of the comparison of knowledge has been known, but for the first time with the unknown inequality or contact. In this section, the concept of “inequality” is further clarified, making it an effective mathematical tool. Students can not understand the meaning of “not greater than ” “not less than ” “negative ”, “non-negative ” in the case of column inequalities, It is difficult to express the unequal relationship, the solution to inequality, inequality