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異分母分數加法
Author:
Tong Wing Hong
GeoGebra
New Resources
拼砌四邊形
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
Discover Resources
缺角立方體
百變糖果棒
三角形全等的理由 – 題4的副本
比一比看谁小
分数减法 Fraction Subtraction
Discover Topics
Linear Programming or Linear Optimization
Perimeter
Confidence Interval
Arithmetic Operations
Power Functions