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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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異分母分數減法
兩位數加法
兩位數除以一位數(二)
三位數除以一位數(一)
畫出對稱圖形
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task3
B小學今星期的遲到人數
圓相切
加法有圖案
用GGB做遊戲 Math Games By GGB
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Statistical Characteristics
Intersection
Inequalities
Special Points
Cosine