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陳隆期
GeoGebra
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兩位數除以一位數(一)
三位數除以一位數(二)
畫出對稱圖形
sanjiaohanshu
四邊形的特性
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橢圓軌跡 (3)
day01_01
Copie de Comparing fractions using number lines and rectangles
圆柱展开成平行四边形2
加法002结果(20以内)
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Cone
Matrices
General Quadrilateral
Intersection
Pie Chart or Circle Chart