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earth
Author:
chen mingchuan
GeoGebra
New Resources
異分母分數減法
畫出對稱圖形
三位數除以一位數（一）
第八周作业
【案例】2013年安徽高考15题
Discover Resources
HKCEE 2009 Q17
阿波羅圓
ycmc P5 Math lesson 1-2
[洋葱] 给定面积找点(0057)
"拈" 類遊戲之一-搶21遊戲 The 21 game
Discover Topics
Arithmetic Mean
Expected Value
Integral Calculus
Histogram
Means