无论是在学习有理数的加法法则、还是在理解绝对值的几何意义、抑或是学习不等式和不等式组的解集概念时引导学生利用数轴,进而培养他们的数形转换能力。利用数轴解题,可以起到化难为易,化繁为简的作用。“数形结合、借图助解”的思想,是我们研究数学问题常用的思维方法。下面举例说明“数轴”这个重要工具在解题中的灵活运用。 Whether learning the addition rules of rational numbers, or understanding the geometric meaning of absolute values, or the concept of solution sets of learning inequalities and inequalities, guide students to use the axes to develop their digital transformation capabilities. The use of digital axes to solve problems can play a role in making it easier and more complicated. The idea of ​​“combination of numbers and shapes and help to solve them by graphs” is a common way of thinking in our study of mathematics problems. The following example illustrates the flexible use of the “number axis” important tool in problem solving.