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task1
Author:
chong yin tung
GeoGebra
New Resources
拼砌四邊形
近似值：有效數字
兩位數除以一位數（二）
兩位數除以一位數（一）
小数 的副本
Discover Resources
以剪貼比較圖形大小
四下_面積（一）(教師版)
reflectional symmetry_3
扇形面積公式1
蚂蚁爬行最短距离问题的副本
Discover Topics
Geometric Transformations
Parametric Curves
Hypergeometric Distribution
Sequences and Series
Tangent Function