字母表示数是初中数学中最重要的基础知识之一.初中代数真正的第一堂课实际就是“字母表示数”.其实字母表示数的概念在小学里已经接触到,而且学得还较为深入.如,通过猜年龄、拼三角形、唱“青蛙跳水”的儿歌等一系列的活动,体会到用字母表示数 The alphabetic representation number is one of the most important basic knowledge in junior high school mathematics. The real first class of junior high school algebra is actually “letter representation number”. In fact, the concept of alphabetic representation number has already come into contact with primary school, and it also learns More in depth. For example, through a series of activities such as guessing ages, spelling triangles, singing frog diving, and so on, you will realize that you can use letters to represent numbers.