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zgc112
GeoGebra
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兩組對邊相等的四邊形
三位數除以一位數(二)
判斷球體
四邉形 (四年級) 教師版
画直线等分三角形的面积
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y=mx+k
畫三角形 第3題
加法002结果(20以内)
翰林數學_2下_CH4-3_梯形中線性質
刘校安排(1)
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Distributions
Orthocenter
Quadratic Functions
Tree Diagrams
Hypergeometric Distribution