横向
1
Amount of space an object occupies
4
Closed shape with straight sides
5
Mathematical rule or equation
7
Number that divides evenly into another
11
Rectangle with four equal sides
12
Symbol representing unknown value
纵向
2
Line crossing from corner to corner
3
Space between two intersecting lines
4
Number divisible only by 1 and itself
6
The number representing nothing
8
Result of multiplication
9
Result of addition
10
Rectangular array of numbers