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ex 5
Author:
LAM YU SANG
GeoGebra
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第八周作业
兩位數除以一位數（一）
拼砌四邊形
兩位數加法
四邉形 (四年級) 教師版
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拋物線
優良作品2(祥恩)
Progressive Formula
蝴蝶定理动态演示
中國火柴遊戲一的副本
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Cone
Planes
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Hyperbola
Solids or 3D Shapes