横向
1
Number divisible only by 1 and itself
3
Part of a whole number
4
Split into equal parts
8
The number representing nothing
10
Space between two intersecting lines
11
Steepness of a line
纵向
2
Math using letters for unknown values
5
Round shape with all points equidistant
6
Number less than zero
7
Parts per hundred
9
Single numeral from 0 to 9