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兩數相加
Author:
李俊賢
藉由數線來表示正負數的相加
GeoGebra
New Resources
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Silhouettes
The black friday GeoGebra :)
Function Art 3D - Pawn
koch tool
Discover Resources
Congruent Angles
Mediatrice du triangle obtus
FISH6
Graph Paper
Discover Topics
Standard Deviation
Means
Parabola
Rhombus
Mode