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等差数列计算练习
Author:
桃篮翁
GeoGebra
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【案例】2018年全国1卷理科12题
算柱 (兩位數)
拼砌四邊形
三位數除以一位數（二）
画直线等分三角形的面积
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quadrilaterals 3
Boxes
Multiplication of Polynomials 1(多項式的乘法 1)
解構正立方體
蝴蝶定理（唐老师的课程）
Discover Topics
Matrices
Quadratic Equations
Tangent Line or Tangent
Bar Chart or Bar Graph
Exponential Functions