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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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兩位數加法
【案例】2018年全国1卷理科12题
近似值：有效數字
小数 的副本
兩位數除以一位數（二）
Discover Resources
幾何原理
共軛點
Ex5D#1
拼數咭
活工(三)Q1
Discover Topics
Fractions
Tree Diagrams
Pyramid
Incircle or Inscribed Circle
Variance