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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lowest common denominator ： ウィキペディア英語版 Lowest common denominator In mathematics, the lowest common denominator or least common denominator (abbreviated LCD) is the least common multiple of the denominators of a set of fractions. It simplifies adding, subtracting, and comparing fractions. == Description == The least common denominator of a set of fractions is the least number that is a multiple of all the denominators: their least common multiple. The product of the denominators is always a common denominator, as in: : $\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac$ but it's not always the least common denominator, as in: : $\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac$ Here, 36 is the least common multiple of 12 and 18. Their product, 216, is also a common denominator, but calculating with that denominator involves larger numbers: $\backslash frac+\backslash frac=\backslash frac+\backslash frac=\backslash frac$. With variables rather than numbers, the same principles apply:〔 : $\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac+\backslash frac\backslash ;=\backslash ;\backslash frac$ Some methods of calculating the LCD are at Least common multiple#Computing the least common multiple. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lowest common denominator」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.