横向
1
Sum divided by count
4
Collection of distinct elements
6
The number representing nothing
7
U-shaped curve of a quadratic function
8
Comparison of two quantities
9
Result of addition
10
Parts per hundred
12
Divisible by two
纵向
1
Math using letters for unknown values
2
Rectangle with four equal sides
3
Power to which a number is raised
5
Value that does not change
11
System of ordered marks for measuring
13
Number greater than zero