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1987全国文9
Author:
常振虎
GeoGebra
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三位數除以一位數（二）
異分母分數減法
兩組對邊相等的四邊形
找出對稱軸
判斷球體
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小數試用
随机分支长度的二分树
perimeter
正多角柱(可輸入底面邊數)
六年級
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Mode
Differential Calculus
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Equations