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減法
Author:
陳冠彰
Topic:
Subtraction
義守財數101級製作
GeoGebra
New Resources
Nested spiral octagon
Fibonacci Clock
四邉形 (四年級) 教師版
美國國旗 (Codex 版)
畫出對稱圖形
Discover Resources
平行四邊形變奏曲III
圓周角與弦切角
判斷柱體 1
Quiz on Solving Right Triangles (Finding Side Lengths) 解直角三角形：測驗1（求邊長）
總結
Discover Topics
Mathematics
Equilateral Triangles
Combinatorics
Exponential Functions
Ratios