横向
1
Sum divided by count
5
Line touching circle at one point
6
Repeated addition
8
Part of a line with two endpoints
9
Lines that never intersect
12
Comparison of two quantities
纵向
2
Number with digits after a point
3
U-shaped curve of a quadratic function
4
The number representing nothing
7
Visual representation of data
8
Collection of distinct elements
10
Split into equal parts
11
Number less than zero