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GeoGebra
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球体的体积推导（优化版）
異分母分數減法
兩位數加法
錐體建築師
【案例】2013年安徽高考15题
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少一塊
線性規劃 - 數學技巧1
Rolling Star
學習活動三聯立不等式的圖形
倒水验证勾股定理
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Similar Triangles
Bar Chart or Bar Graph
Tree Diagrams
Polygons
Pyramid