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Measuring areas by placing different shapes
Author:
Shum Kwok Ching
,
GeoGebra Institute of Hong Kong
GeoGebra
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算柱 (兩位數)
異分母分數減法
兩組對邊相等的四邊形
兩位數除以一位數（一）
四邉形 (四年級) 教師版
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K9@cn
折扣 例5
模擬3D空間物件：空間坐標軸的建立
線性代數
尝试绘本
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Percentages
Boxplot
Exponential Functions
Plane Figures or Shapes
Coordinates