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Author:
李政憲
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
第八周作业
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九點圓 (9-Point Circle)
ggb 優良作品_10
四年級
三角形全等的理由 – 題2的副本
S3 Ex4.3 Q04(3D圖)
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Probability
Statistics
Volume
Geometric Transformations
Geometric Mean