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拋物線
Author:
宋秉祐
GeoGebra
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近似值：有效數字
三位數除以一位數（二）
判斷球體
【案例】2018年全国1卷理科12题
兩位數加法
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菱形
你能找出一元嗎?
三角排列
纏繞SEQUENCE任意多邊版
算盘
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Cone
Stochastic Process or Random Process
Multiplication
Random Experiments
Straight Lines