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小數化百分數（練習）
Author:
maths.ephhk
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
畫出對稱圖形
拼砌四邊形
球体的体积推导（优化版）
四邉形 (四年級) 教師版
Discover Resources
義守財數101級製作
F5_聯立二元一次不等式
放缩尺
limit of function f(x)=x^2
贪吃蛇（第一版）
Discover Topics
Perimeter
General Quadrilateral
Geometric Distribution
Parabola
Multiplication