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陳隆期
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
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了解圓方程(1)
分解三棱柱
翰林B4講p171_類8
gjh-f01-00 最短距離與對稱點
F4_Ch9.1
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Natural Numbers
Arithmetic
Power Functions
Percentages
Subtraction