Across
1
Mathematical statement of equality
5
Result of multiplication
7
Difference between highest and lowest values
9
Value that does not change
10
Result of addition
12
The number representing nothing
Down
2
Exact correspondence on both sides
3
Round shape with all points equidistant
4
Line touching circle at one point
5
Closed shape with straight sides
6
Power to which a number is raised
8
Number that divides evenly into another
11
Mathematical rule or equation