横向
1
Steepness of a line
5
Mathematical statement of equality
6
Rectangular array of numbers
7
U-shaped curve of a quadratic function
8
Repeated addition
9
Round shape with all points equidistant
纵向
2
Longest side of a right triangle
3
Symbol representing unknown value
4
Line crossing from corner to corner
10
Part of a whole number
11
Result of addition
12
Number with digits after a point