横向
1
Rectangle with four equal sides
3
Comparison of two quantities
4
Result of raising a number to an exponent
6
Number with digits after a point
7
Exact correspondence on both sides
9
Mathematical rule or equation
纵向
1
System of ordered marks for measuring
2
U-shaped curve of a quadratic function
5
Number divisible only by 1 and itself
8
The number representing nothing