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Addition of 2 Directed Numbers
Author:
Chan Man Fai
Addition of 2 directed numbers
GeoGebra
New Resources
第八周作业
球體建築師
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
Discover Resources
angles sum of a triangle 2
三角形內心
功課
Introduction of pH
三角函数求值 （单位圆、比值）
Discover Topics
Tree Diagrams
Perimeter
Similarity Transformation or Similarity
Tangent Function
Means