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一數的百分之幾是多少？
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lkkbmaths teachers
GeoGebra
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兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
算柱 (兩位數)
四邉形 (四年級) 教師版
球體建築師
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公因數應用題2
判斷錐體 4
試算表的很多正方形
數學傳播39卷4期, 平面幾何公式思考
Copy of 題 5
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Secant Line or Secant
Sequences and Series
Statistics
Functions
Linear Functions