半分を切り上げる
ハーフアップは標準的な学校スタイルの方法であり、多くの場合、デフォルトで期待されています。
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
Select the place value and inspect the deciding digit.
2
Step 2
If the deciding digit is 5 or greater, round upward.
3
Step 3
Return the rounded value at the chosen precision.
📊 Examples
実用例
Examples include tie values in decimal and whole-place contexts.
| 入力 | ターゲット | 方法 | 結果 |
|---|---|---|---|
| 2.5 | 最も近い整数 | 半分を切り上げる | 3 |
| 7.45 | 最も近い 10 番目 (1 dp) | 半分を切り上げる | 7.5 |
| 1250 | 最も近い百 | 半分を切り上げる | 1300 |
ヒント
よくある間違い
Avoid these frequent rounding errors when validating outputs.
- Using Half Up where unbiased tie handling is required.
- Assuming Half Up and Half Even are equivalent.
- Ignoring sign behavior when comparing with directional methods.
- Confusing nearest rounding with truncation.
❓ よくある質問
よくある質問
When is Half Up best to use?
Use it when your rule is the familiar '5 rounds up' standard.
How is Half Up different from Half Down?
Half Up rounds ties upward, while Half Down rounds ties downward.
How is Half Up different from banker's rounding?
Banker's rounding sends ties to even outcomes instead of always up.
Can I change place values on this page?
Yes. Method is locked to Half Up, but place values are editable.