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Author:
張道民
GeoGebra
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【案例】2013年安徽高考15题
拼砌四邊形
球體建築師
三位數除以一位數（一）
兩位數加法
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五上_分數乘法(學生版)
老師~這樣算另一種嗎??
四次函數
Book10-Unit7-拼出平行四邊形
P4 4N6 分數的種類及轉換 / Fraction Types and Their Conversions
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Straight Lines
Exponential Functions
Probability
Random Experiments
Median Line