注意解决好初中数学的几个关键问题宿州市轻工业学校张耀山教学中解决好初中数学的几个关键问题，将有利于高中、职高、中技、中专的教学。现说明如下：一、形如ａ（ａ＞０）｛ａ｝＝－０（ａ＝０）的教学－ａ（ａ＜０）有的学生常发生这样的疑问：一个数的绝对值怎么会等... Pay attention to solving several key problems of junior high school mathematics The solving of several key problems of junior high school mathematics in Zhang Yaoshan’s teaching in Suzhou City Light Industry School will help the teaching of high school, vocational high school, middle school and secondary school. The explanation is as follows: First, a student with a-(a>0){a}=-0(a=0) teaching-a (a<0) often has such a question: how can the absolute value of one number be Wait...