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数学者であり、物理学者でもあるガウス。彼は実は計算が苦手だったそうです。
1~10までの合計は?と聞かれたらどうしますか。
1+2+3+4+ ・・・+10 = 55って実際に計算して答えますよね。
では、1~100までの合計は?
素直に足しあげるか、電卓かEXCELを使って計算します。
でもガウスは、素直に足さずに道具も使わず数字の法則を考えました。
計算が苦手だからこそ、計算せずにすむ方法をさがしました。
そうやって、いろいろな法則を見つけて功績を残しました。
実際の計算方法 : ( 1 + 100) × 50 = 5050 (本書に記載してあります。)
本書では、数学が苦手な人でも、世の中の計算を面白おかしく説明するというコンセプトで書かれています。
数学=計算と思っている人。その常識が覆りますよ。
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日本経済新聞社 − 岡部 恒治
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今井 俊樹
最終更新
2008-02-26 12:13:43
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