math/知识点/加法.md
2022-08-12 17:10:13 +08:00

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# 加法
> 加法addition通常用加号“+”表示)是基本的算术运算之一,与减法、乘法、除法合称“四则运算”。两个自然数相加是将他们组合起来的总量。
## 性质
- 交换律 $a+b=b+a$
- 结合律 $(a+b)+c = a+(b+c)$