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根據百分率找數量（一）: 例4 的複本
Author:
Miss Tsang
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
近似值：有效數字
sanjiaohanshu
直角坐標平面上的旋轉變換
長方體平面投影 (Codex版)
拼砌四邊形
Discover Resources
畢氏定理
畢氏定理
廣義角的代換(90度加減角度)
任何三角形內角和180度(五上數翰４－２)
勾股定理证明演示--分割股边
Discover Topics
Linear Equations
Vectors
Pie Chart or Circle Chart
Logic
Equations