“0”是我们最常见、最熟悉的数,在数的家族中也有着举足轻重的地位,可是在解题时它很容易被忽视,从而导致“0”失误.在初中阶段,有以下几个内容非常容易出现“0”失误,在此举例介绍.1绝对值例1若x为实数,且|x|=-x,则x0.解析因为非正数的绝对值等于它的相反数,所以x≤0.评注学生都知道:正数的绝对值等于它本身;0的绝对 “0 ” is our most common and most familiar number, and it also plays a decisive role in a number of families. However, when it is solved, it can easily be overlooked, resulting in mistakes .In the junior middle school, There are several things that make it easy to see a “0 ” error, as an example here.1 Absolute Example 1 If x is real and | x | = -x, then x0. Because the absolute value of the non-positive is equal to Its opposite, so x ≤ 0. Commentary Students all know: the absolute value of a positive number is equal to itself; the absolute value of 0