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Multiplication of Directed Numbers
Author:
chisunch1
GeoGebra
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三位數除以一位數（二）
拼砌四邊形
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
找出對稱軸
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太极图
五複合正六面體
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二次方程动态函数曲线
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Inequalities
Addition
Arithmetic
LCM and GCD
Multiplication