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乘法1
Author:
chen mingchuan
GeoGebra
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兩位數除以一位數（二）
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
拼砌四邊形
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task8
ggb-fs-a3 用物件表示分數比例
動國旗
Orthocentre
了解圓方程(1)的副本
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Ellipse
Linear Regression
Translation
Addition
Sequences and Series