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Author:
赵林
GeoGebra
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兩組對邊相等的四邊形
兩位數除以一位數（二）
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
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Quiz on Trigonometric Ratios 辨認三角比：測驗
p04 fixed distance from a line
滑桿動畫
Rotation in the Coordinate Plane
Copy of 畫三角形 題1a
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Functions
Function Graph
Random Experiments
Straight Lines
Hypothesis Testing