横向
1
Number less than zero
5
U-shaped curve of a quadratic function
6
Number with digits after a point
8
Mathematical rule or equation
9
Result of multiplication
纵向
2
Line touching circle at one point
3
System of ordered marks for measuring
4
Difference between highest and lowest values
7
Split into equal parts
10
The number representing nothing
11
Comparison of two quantities
12
Result of addition
13
Part of a whole number