横向
1
Line segment connecting two circle points
3
Number greater than zero
7
Repeated addition
8
Number that divides evenly into another
9
Collection of distinct elements
11
The number representing nothing
纵向
2
Result of raising a number to an exponent
4
Symbol representing unknown value
5
Number with digits after a point
6
Comparison of two quantities
10
Visual representation of data
12
Parts per hundred
13
Three-sided polygon