横向
1
Number with digits after a point
2
Lines that never intersect
4
Corner point of a polygon
5
Longest side of a right triangle
7
Repeated addition
10
Result of multiplication
12
The number representing nothing
纵向
2
Closed shape with straight sides
3
Power to which a number is raised
6
Symbol representing unknown value
8
Three-sided polygon
9
System of ordered marks for measuring
11
Difference between highest and lowest values
13
Single numeral from 0 to 9