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1989全国理20
Author:
常振虎
GeoGebra
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兩位數加法
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
異分母分數減法
GeoGebra笔记功能体验课件
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Quiz on Factorization of Quadratic Polynomials (Table Method) 因式分解一元二次多項式(表格法)：測驗
Rectangle_01
國旗製作
轉彎的文字
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Perimeter
Geometric Mean
LCM and GCD
Subtraction
Correlation