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19x19 乘法表練習
Author:
学用数学
GeoGebra
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正方形雪花图案
第三周作业效果演示
撒针估算面积实验
第八周作业1
比較五件物件的重量
Discover Resources
Addition and Subtraction of Polynomials(多項式的加減法)
平面直角坐标系
分段函数
Question 4
dynamics dragon
Discover Topics
Geometry
Root
Matrices
Cone
Addition