横向
1
Single numeral from 0 to 9
3
Lines that never intersect
4
Parts per hundred
6
Collection of distinct elements
8
Repeated addition
10
Part of a circle's circumference
纵向
2
Result of multiplication
3
Number divisible only by 1 and itself
5
Line touching circle at one point
7
Symbol representing unknown value
8
Rectangular array of numbers
9
Line segment connecting two circle points
11
U-shaped curve of a quadratic function