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賺賠：例2
Author:
GeoGebra Institute of Hong Kong
GeoGebra
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兩位數加法
球体的体积推导（优化版）
算柱 (兩位數)
画直线等分三角形的面积
兩位數除以一位數（一）
Discover Resources
waaachen
正七邊形2
gct-a01-jc091v1-27 三角形旋轉
序列嵌套
三角函数的副本
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Histogram
Mode
Indefinite Integral
Quadrilaterals
Real Numbers