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同学们初学绝对值时,会有各种各样的困惑.怎样才能学好绝对值呢?下面就请大家来看一看吧.一、正确理解绝对值的几何意义绝对值的几何意义:一个数a的绝对值,就是数轴上表示数a的点到原点的距离,记作|a|.如图1,表示-1.5的点A到原点的距离是1.5,所以-1.5的绝对值是1.5;表示0.5的点B到原点的距离是0.5,所以0.5的绝对值是0.5;特别地,表示0的点到原点的距离是0,所以0的绝对值是0.以上过程可用符号表示
Students beginners absolute value, there will be a variety of confusion.How can we learn absolute value? Here’s a please take a look at it. First, the correct understanding of the absolute value of the geometric meaning of the absolute value of the geometric meaning: a number The absolute value of a is the distance from the origin to the point that represents the number a in the number axis, which is denoted as | a |. As shown in Figure 1, the distance from point A to the origin of -1.5 is 1.5, so the absolute value of -1.5 is 1.5. The distance between the point B representing the 0.5 and the origin is 0.5, so the absolute value of 0.5 is 0.5; in particular, the distance from the point of origin representing the point 0 is 0, so the absolute value of 0 is 0. The above process can be symbolized