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S12G4 長方形內夾正方形的周長問題
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学用数学
GeoGebra
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算柱 (兩位數)
異分母分數減法
兩位數加法
判斷球體
四邉形 (四年級) 教師版
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「分點」平行四邊形
基本三角函數
六面體與八面體
congruent triangle_provided by Mr Yeung Kar Chun
y=sinx描點
Discover Topics
Percentages
Trigonometric Functions
Subtraction
Integral Calculus
Standard Deviation