相反数和绝对值是两个非常重要的基础概念,有着广泛的应用.不少学生在学习时觉得不好理解,应用时经常出问题,下面就和同学们一起学习相反数和绝对值.1.理解相反数的概念要注意“只有符号不同”的含义,及零的相反数是零的这个规定.2.互为相反数指的是一对数,甲、乙两数互为相反数包括甲是乙的相反数,乙也是甲的相反数. The opposite and absolute values ​​are two very important basic concepts, has a wide range of applications.Many students feel poor understanding of the learning, the application often problems, the following students and students to learn the opposite and absolute value.1 . Understand the concept of the opposite number should pay attention to the meaning of “only the sign is different ”, and the opposite of zero is zero .2. Reciprocal number refers to a pair, A and B opposite each other Numbers include A is the opposite of B, B is the opposite of A.