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Author:
chen mingchuan
GeoGebra
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三位數除以一位數（一）
異分母分數減法
四邊形的特性
兩位數除以一位數（二）
【案例】2013年安徽高考15题
Discover Resources
Parallelogram 01
Conic Sections
FHMS Corr Angles on NonParallel Lines
test
sin 的泰勒展開式
Discover Topics
Quadrilaterals
Polygons
Integers
Root
Diagrams