You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
4 lines
182 B
4 lines
182 B
3 weeks ago
|
如何认识自然数？
|
||
|
|
数是对数量的抽象 / 数关系是对数量关系的抽象：大与小 /
|
||
|
|
可以有两种方法实现这种抽
|
||
|
|
象：对应的方法和定义的方法
|