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20180412 同分母分數加法
Author:
makkei
GeoGebra
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兩位數加法
兩位數除以一位數（二）
兩位數除以一位數（一）
找出對稱軸
四邊形的特性
Discover Resources
ActIVIDAD 2.2
trapezium
play tennis
複合圖形表面積(一)
ghseh 二次函數動畫左右平移
Discover Topics
Definite Integral
Addition
Sphere
Expected Value
Set Theory