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七巧板
Author:
WYC
GeoGebra
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近似值：有效數字
畫出對稱圖形
小数 的副本
拼砌四邊形
四邉形 (四年級) 教師版
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根據百分率找數量（一）:例1
四連桿(可調)
左右
面積
立體旋轉卡片
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Derivative
Rational Numbers
Probability
Volume
Median Line