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1989全国文13
Author:
常振虎
GeoGebra
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算柱 (兩位數)
【案例】2018年全国1卷理科12题
球體建築師
拼砌四邊形
三位數除以一位數(二)
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平移法(一)
Area
圖形的周界
抛物线动态(不一样的做法)
半圆的滚动
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Calculus
Mode
LCM and GCD
Histogram
Vectors 2D (Two-Dimensional)