讲完了含绝对值的不等式 ,补充作业中有两道填空题 :1不等式 |2 x +1|+|x|1的解集是 ;2不等式 |x +1|+|x|2的解集是 .而这种类型的不等式课本中未出现 ,我想让学生做完后 ,评讲时再将其解法进行补讲 .作业交上来了 ,多数同学所填的答案都是正确的 .因为是填空题 ,看不到解题? After completing the inequality with absolute value, there are two fill-in questions in the supplementary work: 1 The solution set of the inequality |2 x +1|+|x|1 is; 2 The solution set of the inequality |x +1|+|x|2 Yes. And this type of inequality textbook does not appear. I want to ask the students to complete the commentary and then add their solution to the lecture. The assignment is handed in. Most students fill in the correct answer. Because it is Fill in the blank, can not see the problem?