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proof*5 張華炘
Author:
郭亮偉
GeoGebra
New Resources
異分母分數減法
畫出對稱圖形
錐體建築師
兩位數除以一位數（二）
四邉形 (四年級) 教師版
Discover Resources
百分數（小學）：折扣 / 賺賠（HTML5 版）
gslsb 正方形數列
two-example
同心六邊形
關燈遊戲3x3 Lights Out Game
Discover Topics
Parabola
Symmetry
Correlation
Polynomial Functions
Function Graph