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Merge pull request #29394 from wxy/20230208.3-⭐️⭐️⭐️-Why-does-0.1-+-0.2-=-0.30000000000000004

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R:published/20230208.3 ⭐️⭐️⭐️ Why does 0.1 + 0.2 = 0.30000000000000004.md
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@ -137,7 +137,7 @@ $$2^{1} (1 + \frac{2^{51}}{2^{52}})$$
#### 步骤 1：获取 0.1 和 0.2 的指数和尾数
我用 Python 编写了一些（to 校正：这里原文加了一个 inefficient 形容词，不知道如何翻译）函数来获取正浮点数的指数和尾数:
我用 Python 编写了一些低效的函数来获取正浮点数的指数和尾数:
```
def get_exponent(f):