横向
1
Number divisible only by 1 and itself
3
Part of a line with two endpoints
4
Exact correspondence on both sides
6
Middle value in an ordered dataset
7
Symbol representing unknown value
8
Mathematical statement of equality
9
Repeated addition
11
Part of a whole number
纵向
2
Difference between highest and lowest values
3
System of ordered marks for measuring
4
Collection of distinct elements
5
Proven mathematical statement
10
Rectangular array of numbers
12
Value that does not change
13
Line crossing from corner to corner