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根據百分率找數量（二）: 例1
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
New Resources
美國國旗 (Codex 版)
拼砌四邊形
第八周作业
算柱 (兩位數)
四邊形的特性
Discover Resources
乘法運算
分數除法
垂心的動畫
Ambiguous Cylinder illusion
扇形在射线上滚动
Discover Topics
Combinatorics
Square
Optimization Problems
Congruence
Geometric Transformations