Across
1
The number representing nothing
3
Result of addition
5
System of ordered marks for measuring
6
Sum divided by count
7
Total distance around a shape
Down
2
Number with digits after a point
4
U-shaped curve of a quadratic function
7
Result of raising a number to an exponent
8
Number less than zero
9
Power to which a number is raised
10
Mathematical statement of equality
11
Split into equal parts
12
Middle value in an ordered dataset