丸める
解説 Definition
rounding は round（丸める）の動名詞・現在分詞です。数値を近い整数や指定した桁に丸めることを表し、数学やコンピューターの文脈でよく使われます。
Rounding is the process of replacing a number with a nearby, simpler value, such as the nearest integer or a value with a specified number of decimal places. It can also be the present participle of the verb round in this mathematical sense.
覚え方のコツ Memory Tip
rounding は動詞 round に -ing を付けた動名詞・現在分詞です。round は発音を変えず、語末にそのまま -ing を加えて /ˈraʊndɪŋ/ となります。数の細かな部分を取り、扱いやすい値に「丸くする」と考え、「rounding to the nearest integer」「rounding errors」で覚えます。
Rounding is formed by adding -ing directly to round, with no spelling change, and is pronounced /ˈraʊndɪŋ/. In mathematics and computing, imagine removing a number’s sharp, unnecessary detail to give it a simpler “round” form. Learn the patterns rounding a number, rounding to the nearest integer, and rounding to two decimal places. The noun rounding names the process, while the participle appears in phrases such as when rounding small values. Do not confuse rounding with truncation: rounding may move a value up or down according to a rule, whereas truncation simply cuts off unwanted digits.
例文
Rounding the number makes the answer easier to read.
その数を丸めると、答えが読みやすくなります。
The app uses rounding for prices after tax.
そのアプリは税込み価格に丸め処理を使います。
Be careful when rounding small values.
小さな値を丸めるときは注意してください。
rounding の類義語・関連語
類義語
対義語
派生語
紛らわしい語
rounding の語源・成り立ち Etymology
古フランス語 reont（丸い）、さらにラテン語 rotundus（円形の）に由来。rot-（回転する）が語根で、wheel の回転と同じイメージ。関連語：round（丸い）、rotund（丸々とした）。「回転→円→丸くする」という意味の流れで、角を取って丸める動作を表す。
Rounding is the -ing form of the verb round. Round came into English through Old French forms related to reont or rond, ultimately from Latin rotundus, “circular or round.” Its history is connected with the idea of turning or circular shape. From describing shape, round developed verbal senses such as “make round” and, in mathematics, “replace with a nearby simpler number.” The suffix -ing allows the word to name that process or describe it as an ongoing action.
同じレベルの語彙をもっと
外部辞書で調べる
この英単語をクイズで覚えよう