横向
1
Result of multiplication
5
Split into equal parts
6
Exact correspondence on both sides
7
Sum divided by count
8
Math using letters for unknown values
纵向
2
Result of addition
3
Three-sided polygon
4
Repeated addition
9
Corner point of a polygon
10
Number divisible only by 1 and itself
11
U-shaped curve of a quadratic function
12
Visual representation of data