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cute panda
Author:
李春培
cute panda
GeoGebra
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兩位數加法
第八周作业
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
算柱 (兩位數)
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塗色
ie 1
椭圆中的对称斜率为定值问题20190917
乘法練習
微元法演示
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Secant Line or Secant
Symmetry
Limits
Quadrilaterals
Interest Calculation