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Author:
tan90t
sarthstytrhyergar
GeoGebra
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兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
三位數除以一位數（二）
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Parallelogram 02
中心对称与轴对称图形.许兴华数学
Solving the equations in the form ax + b = cx + d (Grouping like terms)
分数减法 Fraction Subtraction
杨辉三角形 Pascal Triangle
Discover Topics
Subtraction
Mathematics
Arithmetic Operations
Continuity
Complex Numbers