Across
1
Single numeral from 0 to 9
4
Difference between highest and lowest values
5
Number less than zero
6
The number representing nothing
10
Part of a whole number
12
Result of multiplication
Down
2
Rectangular array of numbers
3
Line touching circle at one point
7
Number with digits after a point
8
Middle value in an ordered dataset
9
Sum divided by count
11
Three-sided polygon