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包含除法（1 ÷分數）的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
Topic:
Fractions
GeoGebra
New Resources
四邉形 (四年級) 教師版
Nested spiral octagon
長方體平面投影 (Codex版)
近似值：有效數字
sanjiaohanshu
Discover Resources
Polygon incised
固定周界的長方形面積變化
volume
Copy of 固定面積的圖形的周界變化
扇形:圖片與動畫使用
Discover Topics
Circle
Probability
Parametric Curves
Rhombus
Sequences and Series