Across
1
Part of a whole number
4
Single numeral from 0 to 9
6
Repeated addition
7
Comparison of two quantities
9
Number divisible only by 1 and itself
11
Rectangular array of numbers
12
Divisible by two
Down
2
Difference between highest and lowest values
3
Reference line in a graph
4
Split into equal parts
5
Proven mathematical statement
8
Mathematical rule or equation
10
U-shaped curve of a quadratic function
13
Mathematical statement of equality