『なぜ数学が「得意な人」と「苦手な人」がいるのか』ブライアン バターワース, Brian Butterworth, 藤井 留美(主婦の友社)
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『数を扱う能力は誰もが持っている。「数学脳」を鍛えれば数学は楽しい。』
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