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隨機出題：整數的減法
Author:
呂紹行
GeoGebra
New Resources
画直线等分三角形的面积
【案例】2018年全国1卷理科12题
拼砌四邊形
三位數除以一位數（一）
算柱 (兩位數)
Discover Resources
扇形面積
gjh-g05-00 平方差公式
All you need is
省政信箱
拼出三角形的副本
Discover Topics
Frequency Distribution
Line Segment
Mathematics
Isosceles Triangles
Difference and Slope