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減法
Author:
陳冠彰
Topic:
Subtraction
義守財數101級製作
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
畫出對稱圖形
拼砌四邊形
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代數
Task 4 Square
正方形和長方形有甚麼特性？
直線上的鄰角_2
拼數咭
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Median Line
Calculus
Matrices
Random Experiments
LCM and GCD