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冷氣機的銷量
Author:
iedc
GeoGebra
New Resources
畫出對稱圖形
判斷球體
異分母分數減法
拼砌四邊形
三位數除以一位數（二）
Discover Resources
quadrilaterals 2
題二
三年級除法(三)：一位數除三位數
碎形六邊形的副本
星形线-Astroid Curve-with-Envelope Command
Discover Topics
Dilation
Difference and Slope
Rational Numbers
Arithmetic Mean
Frequency Distribution