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k126各國基地
Author:
華柏維
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
四邉形 (四年級) 教師版
兩位數加法
兩位數除以一位數（二）
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生活
gjh-g03-00 和的平方公式
三角網狀圖
立體三角測量(例五)
Is it a condition for //gram?
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Arithmetic Operations
Cube
Median Value
Line Segment
Trigonometric Functions