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三线八角
Author:
谭伟
GeoGebra
New Resources
兩位數除以一位數（二）
四邉形 (四年級) 教師版
柱體建築師
異分母分數減法
兩組對邊相等和有直角的四邊形
Discover Resources
分數除法 1：a ÷ b（均分）
集合運算
Rectangle _03
兩線段和圓的關係2
折纸—直三棱锥
Discover Topics
Interest Calculation
Arithmetic Operations
Polygons
Cuboid
Quadrilaterals