Across
1
Number divisible only by 1 and itself
4
System of ordered marks for measuring
5
Power to which a number is raised
6
Part of a whole number
8
Steepness of a line
10
Difference between highest and lowest values
11
Comparison of two quantities
12
Proven mathematical statement
Down
2
Mathematical rule or equation
3
Three-sided polygon
7
Number greater than zero
9
Parts per hundred