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七年级数学新人教版第九章《不等式与不等式组》,通过教学,发现在练习册和测试题中有很多关于求字母的取值范围的填空题,题目的位置比较散乱,题目的样式多,有的题比较难做,如果碰到一题做一题或讲解一题,学生不容易理解,而且不会掌握方法,再碰到类似的题仍然不会做。在学习完不等式与不等式组的知识后,我把求字母的取值范围作为一个专题来讲。
Seventh grade mathematics new teaching version of Chapter IX “inequality and inequality group”, through teaching, found in the exercise book and test questions, there are many on the letter seeking the scope of the fill-in-the-blank title of the topic more scattered, the title of the style Some questions are more difficult to do. If you run into a question or explain a problem, the students will not understand it easily, and you will not grasp the method. If you encounter a similar question, you will still not do it. After learning the knowledge of inequality and inequality groups, I took the range of letters as a topic.