Across
1
Number less than zero
5
Rectangular array of numbers
7
Repeated addition
8
Exact correspondence on both sides
9
Difference between highest and lowest values
10
Divisible by two
Down
2
Part of a circle's circumference
3
Single numeral from 0 to 9
4
Total distance around a shape
6
Parts per hundred
11
Mathematical statement of equality
12
Result of raising a number to an exponent