横向
1
Number less than zero
4
Result of addition
6
Lines that never intersect
7
Mathematical rule or equation
8
Parts per hundred
12
Number divisible only by 1 and itself
13
Rectangular array of numbers
纵向
2
Repeated addition
3
System of ordered marks for measuring
5
Round shape with all points equidistant
9
Sum divided by count
10
Amount of space an object occupies
11
Total distance around a shape