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20180904 99乘法 testing 3h
Author:
makkei
GeoGebra
New Resources
兩位數除以一位數（二）
四邊形的特性
異分母分數減法
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
Discover Resources
拋物線軌跡圖
拋物線
橢圓
希式半月形的變形
畢氏定理
Discover Topics
Division
Centroid or Barycenter
Statistics
Bar Chart or Bar Graph
Interest Calculation