下半回合
Half Down 是一种特定于平局的方法，适用于应减少向上平局偏差的情况。
舍入计算器
输入数字并选择您的舍入首选项
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🪄 快速示例
📋 How It Works
它是如何运作的
1
Step 1
Round to the nearest value for non-tie digits.
2
Step 2
On exact ties at 5, round downward.
3
Step 3
Keep method behavior consistent across all place values.
📊 Examples
工作示例
Tie cases are emphasized so Half Down differences stay clear.
| 输入 | 目标 | 方法 | 结果 |
|---|---|---|---|
| 2.5 | 最接近的整数 | 下半回合 | 2 |
| 7.45 | 最近的十分之一 (1 dp) | 下半回合 | 7.4 |
| 1250 | 最近的一百个 | 下半回合 | 1200 |
温馨提示
常见错误
Avoid these frequent rounding errors when validating outputs.
- Treating Half Down as a directional method.
- Forgetting that values above 5 still round up.
- Applying Half Down when regulation requires Half Even.
- Ignoring sign-sensitive cases in test examples.
❓ 常见问题解答
常见问题解答
What is the Half Down tie rule?
Exact ties at 5 round down; values above 5 round up.
Is Half Down the same as floor?
No. Half Down is nearest-value with tie logic, floor is directional toward negative infinity.
When is Half Down useful?
It is useful when your rounding policy requires downward tie handling.
Can I compare Half Down with other methods?
Yes. Use related method pages for direct tie-policy comparisons.