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旋轉對稱 Rotational symmetry
Author:
TANG TSZ YUEN
Topic:
Symmetry
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
sanjiaohanshu
三位數除以一位數（一）
四邉形 (四年級) 教師版
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包含除法（1 ÷分數）
三節棍
If指令的應用1
[洋葱] 一线三等角的应用
兩位數除兩位數(例子一)
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