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ex 9
Author:
LAM YU SANG
GeoGebra
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異分母分數減法
兩位數除以一位數（二）
三位數除以一位數（一）
第八周作业
兩組對邊相等和有直角的四邊形
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廣義角的代換(180,360)
圓環
製作對稱圖_教師示範
摺長方形
老師講解8
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Tree Diagrams
Rational Numbers
Statistics
Quadratic Equations
Step Functions