横向
1
Total distance around a shape
6
Part of a circle's circumference
7
Part of a whole number
8
The number representing nothing
9
Math using letters for unknown values
10
Value that does not change
纵向
2
Number less than zero
3
Parts per hundred
4
Number divisible only by 1 and itself
5
Mathematical statement of equality
11
Closed shape with straight sides
12
Split into equal parts
13
Distance from center to edge of circle
14
System of ordered marks for measuring