随着负数的引入,初中的运算与小学的运算相比发生了很大的变化.初中有理数的运算除了要考虑绝对值以外,还必须注意符号.因此,我们在进行有理数运算时应注意如下几点:1、正确理解有关概念有的同学在计算中经常出现如下错误:-|-5|=5,-24=16,(-1)100=100,23=6,(-4)2=-16.当指出其 With the introduction of negative numbers, the operation of the junior high school has changed greatly compared with the operation of the elementary school. In addition to considering the absolute value, the operation of the rational number of the junior high school must also pay attention to symbols. Therefore, we should pay attention to the following when performing rational number operations. Points: 1, correctly understand the relevant concepts Some students often appear in the calculation of the following error: - | -5 | = 5, -24 = 16, (-1) 100 = 100, 23 = 6, (-4) 2 = -16. When pointed out