横向
1
Symbol representing unknown value
5
System of ordered marks for measuring
6
Line touching circle at one point
7
Visual representation of data
8
U-shaped curve of a quadratic function
9
Line crossing from corner to corner
10
Value that does not change
12
Repeated addition
纵向
2
Math using letters for unknown values
3
Distance from center to edge of circle
4
Mathematical statement of equality
11
Number divisible only by 1 and itself