横向
1
Number less than zero
6
Closed shape with straight sides
7
Middle value in an ordered dataset
8
Total distance around a shape
10
Distance from center to edge of circle
11
Comparison of two quantities
纵向
2
Math using letters for unknown values
3
Mathematical rule or equation
4
Split into equal parts
5
Symbol representing unknown value
9
Result of addition
12
Amount of space an object occupies