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題 1
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
,
Polygons
計算下圖的面積。
GeoGebra
New Resources
拼砌四邊形
球體建築師
三位數除以一位數（二）
算柱 (兩位數)
異分母分數減法
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分數乘法
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