Across
1
Math using letters for unknown values
5
Part of a whole number
6
Part of a circle's circumference
9
Middle value in an ordered dataset
Down
2
Divisible by two
3
U-shaped curve of a quadratic function
4
The number representing nothing
5
Number that divides evenly into another
7
Repeated addition
8
Total distance around a shape
10
Difference between highest and lowest values