横向
1
Number less than zero
5
Amount of space an object occupies
6
Result of multiplication
8
Number that divides evenly into another
10
Difference between highest and lowest values
纵向
2
Exact correspondence on both sides
3
U-shaped curve of a quadratic function
4
The number representing nothing
7
Proven mathematical statement
9
Distance from center to edge of circle
11
Power to which a number is raised
12
Line segment connecting two circle points
13
Parts per hundred