横向
1
Number greater than zero
6
Lines that never intersect
7
Steepness of a line
9
Parts per hundred
11
Sum divided by count
12
Amount of space an object occupies
13
Number divisible only by 1 and itself
纵向
2
System of ordered marks for measuring
3
Power to which a number is raised
4
Number that divides evenly into another
5
The number representing nothing
8
Symbol representing unknown value
10
Reference line in a graph