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GeoGebra
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兩位數加法
【案例】2013年安徽高考15题
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
找出對稱軸
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反射定律 Law of Reflection
類正五邊形摺法
正方形面積
Addition and Subtraction of Polynomials 2 (多項式的加減法2)
验证2
Discover Topics
Percentages
Cuboid
Indefinite Integral
Division
Symmetry