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堆垛
Author:
rachmaninoff
GeoGebra
New Resources
兩位數加法
兩位數除以一位數（一）
球體建築師
画直线等分三角形的面积
第八周作业
Discover Resources
拋物線(開口向上)
七巧板
乘法表的自动练习的副本
龜甲
圓心在同一直線上且相切的圓(半徑可改變)
Discover Topics
Standard Deviation
Correlation
Means
Pyramid
Frequency Distribution