横向
1
Single numeral from 0 to 9
2
Rectangular array of numbers
4
Round shape with all points equidistant
6
System of ordered marks for measuring
7
Result of addition
8
Result of multiplication
9
U-shaped curve of a quadratic function
10
Total distance around a shape
纵向
2
Repeated addition
3
Line touching circle at one point
5
Distance from center to edge of circle