百の位に四捨五入
このページは、価格設定とレポートで一般的な小数点第 2 位の四捨五入を対象としています。
四捨五入計算機
数値を入力し、丸め設定を選択します
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🪄 簡単な例
📋 How It Works
仕組み
1
Step 1
Keep two decimal places and inspect the thousandths digit.
2
Step 2
Apply your selected method, especially for tie values.
3
Step 3
Return a 2 dp result.
📊 Examples
実用例
Worked examples show normal, tie, and very small decimal scenarios.
| 入力 | ターゲット | 方法 | 結果 |
|---|---|---|---|
| 3.14159 | 最も近い百番目 (2 dp) | 半分を切り上げる | 3.14 |
| 2.675 | 最も近い百番目 (2 dp) | 半分を切り上げる | 2.68 |
| 0.0049 | 最も近い百番目 (2 dp) | 半分を切り上げる | 0.00 |
ヒント
よくある間違い
Avoid these frequent rounding errors when validating outputs.
- Checking the wrong deciding digit.
- Assuming all methods handle values ending in 5 identically.
- Forgetting to preserve two decimals in display formatting.
- Using truncate when nearest-value rounding is expected.
❓ よくある質問
よくある質問
Which digit controls hundredth rounding?
The thousandths digit decides what happens to the hundredths digit.
Can I compare methods on this page?
Yes. Method selection is open while the target remains locked to hundredth.
Is this useful for currency-like precision?
Yes. Two decimals are common for prices and financial summaries.
Where do I round to 3 or 4 decimals?
Use the round-to-decimal-places hub.