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18以內的加法_李樂雯
Author:
Li Lok Man
GeoGebra
New Resources
双心四边形
正方形雪花图案
异形操场
圓的切線方程
撒针估算面积实验
Discover Resources
task 1
max{f(x),g(x),s(x)} 與 min{f(x),g(x),s(x)}
Testing
內心
閱讀量杯
Discover Topics
Differential Calculus
Parabola
Kite
Multiplication
General Quadrilateral