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矩阵（自动）计算（数据为0-5的随机数）
Author:
苏州金门布衣
Topic:
Matrices
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
畫出對稱圖形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
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畢式定理 (04)
HKCEE-AM 2006 Q17
對稱圖形
circle: line from centre
小学资源收集
Discover Topics
Square
Natural Numbers
Fractions
Scalene Triangles
Linear Programming or Linear Optimization