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面積與周界活動
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lkkbmaths teachers 檔案儲存用
GeoGebra
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近似值：有效數字
小数 的副本
第八周作业
sanjiaohanshu
畫出對稱圖形
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任務2
拋物線與直線相交弓形區域
小棒
数学分析讲义
勾股定理的直观证明（义务教育数学 新课标-例82）
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Subtraction
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Mathematics
Linear Programming or Linear Optimization
Equations