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Author:
Jia-ming Shiu
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GeoGebra
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兩位數除以一位數（二）
球體建築師
兩位數加法
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
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地球儀5
Quiz on True Bearings 真方位角：測驗
軌跡為橢圓或雙曲線
對頂角_2
圆锥侧面展开图
Discover Topics
Rotation
Tree Diagrams
Difference and Slope
Mathematics
Rational Numbers