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20200417平面直角坐标系复习T14（3）
Author:
陈敦莹
GeoGebra
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拼砌四邊形
三位數除以一位數（一）
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
異分母分數減法
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test for fun
觀察對數的對稱性
Meaning of Negative Indices 負指數的意義
Similar triangles inscribed iteration400
三位數除以一位數（一）
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Means
Function Graph
Coordinates
Confidence Interval
Cuboid