横向
1
Repeated addition
3
Difference between highest and lowest values
4
The number representing nothing
5
Number greater than zero
7
Exact correspondence on both sides
8
Collection of distinct elements
9
Number less than zero
纵向
2
Mathematical statement of equality
5
Result of multiplication
6
Amount of space an object occupies
10
Part of a whole number
11
Number divisible only by 1 and itself