Across
1
Difference between highest and lowest values
2
Exact correspondence on both sides
4
Rectangular array of numbers
5
Number less than zero
6
Closed shape with straight sides
8
U-shaped curve of a quadratic function
Down
2
System of ordered marks for measuring
3
Mathematical statement of equality
7
Mathematical rule or equation
8
Result of raising a number to an exponent
9
Three-sided polygon
10
Math using letters for unknown values