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Author:
螢橋國中
GeoGebra
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三位數除以一位數（二）
兩位數除以一位數（一）
兩位數除以一位數（二）
球体的体积推导
兩組對邊相等和有直角的四邊形
Discover Resources
clock
了解為何 d(lnx)/dx = 1/x
畢式定理（丞昀）
angles sum on a striaght line
test
Discover Topics
Algebra
Square
Boxplot
Multiplication
Sequences and Series