横向
1
Single numeral from 0 to 9
4
Number greater than zero
5
Visual representation of data
6
Proven mathematical statement
8
Value that does not change
9
Sum divided by count
纵向
1
Split into equal parts
2
Math using letters for unknown values
3
Result of multiplication
7
Amount of space an object occupies
10
Number divisible only by 1 and itself
11
Total distance around a shape
12
Line crossing from corner to corner
13
Part of a line with two endpoints