Across
1
Rectangular array of numbers
4
Number with digits after a point
5
Single numeral from 0 to 9
7
Difference between highest and lowest values
8
Longest side of a right triangle
10
Sum divided by count
11
Number greater than zero
Down
2
Number less than zero
3
The number representing nothing
6
Exact correspondence on both sides
9
Space between two intersecting lines
11
Result of raising a number to an exponent