Koyama, Masataka: "Research on the Process of Understanding Mathematics : Ways of Measuring Area of Trapezoid"Proceedings of the 27th PME Conference. 1. 239 (2003)
Koyama, Masataka: "Research on the Process of Understanding Mathematics : Ways of Measuring Area of Trapezoid"Proceedings of the 27th PME Conference. 1. 239 (2003)
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小山正隆:“理解数学过程的研究:梯形面积的测量方法”第 27 届 PME 会议论文集。
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