横向
1
Line crossing from corner to corner
6
Longest side of a right triangle
8
U-shaped curve of a quadratic function
10
The number representing nothing
纵向
2
Symbol representing unknown value
3
Repeated addition
4
Difference between highest and lowest values
5
Middle value in an ordered dataset
7
Visual representation of data
9
Math using letters for unknown values
11
Mathematical rule or equation