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龍騰4_1-1課例1
Author:
廖傑成
GeoGebra
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兩位數加法
兩位數除以一位數（二）
球體建築師
四邊形的特性
畫出對稱圖形
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echen say
log functions
畢氏定理完成20170330final
拋物線2--焦點法
翰林數學_2下_CH3-1_三角形的外角和
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Step Functions
Function Graph
Diagrams
Statistical Characteristics
Rotation