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Author:
万超杰
GeoGebra
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異分母分數減法
四邊形的特性
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
兩位數除以一位數（一）
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waaachen
fsfafasfas
x^3+y^3-3xy
circle
三角形三边关系探究习题
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Diagrams
Algebra
Arithmetic Mean
Fractions
Hypothesis Testing