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異分母的分數加減
Author:
arist
GeoGebra
New Resources
異分母分數減法
算柱 (兩位數)
兩位數除以一位數（一）
四邉形 (四年級) 教師版
畫出對稱圖形
Discover Resources
Angle Sum of Pentagon (SWC)
謝爾賓斯基三角形(Sierpinsky)
动态演示面动成体：圆柱、圆锥、圆台、球
翰林數學_2下_CH4-2_特殊平行四邊形有關對角線的性質
双心四边形
Discover Topics
Subtraction
Definite Integral
Rectangle
Distributions
Step Functions