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tan90
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
兩位數加法
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
Discover Resources
Drawing quadrilaterals on the grid or the pinboard
Probability(概率）
區塊斜線教學
圖形遊戲
a sin(bx+c) + d 的圖形的副本
Discover Topics
Logic
Plane Figures or Shapes
Differential Equation
Fractions
Quadratic Functions