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freeCodeCamp/guide/chinese/mathematics/adding-and-subtracting-negative-numbers/index.md
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---
title: Adding and Subtracting Negative Numbers
localeTitle: 添加和减去负数
---
## 添加和减去负数
增加和减去正数是相当直接的,但添加和减去负数是什么意思?让我们看一个真实世界的例子,以获得更好的主意。假设我们有一个带有一些气球的篮子将它向上推,并将一些重物系在上面并将其向下推。想象一下将气球向上拉为正数的力量,以及将其向下拉为负数的力。如果我们添加更多权重,就像我们添加一个负数而篮子被拉下来。如果我们移除重量,我们减去一个负数,篮子就会被拉上。
### 例子
-1+ 3 = 2
-3+ - 3= -6
-2 - 4 = -6
-10+ 2 = -8
20 +-44= -24
#### 更多信息: