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分數乘法列式練習
Author:
lkkbmaths teachers
Topic:
Fractions
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sanjiaohanshu
異分母分數減法
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
GeoGebra笔记功能体验课件
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北區模考多選第八題 (2014.03.06)
阿波羅圓
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
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