Across
1
Number less than zero
6
Steepness of a line
7
Result of multiplication
8
Mathematical statement of equality
Down
2
Difference between highest and lowest values
3
Three-sided polygon
4
Value that does not change
5
Sum divided by count
6
Exact correspondence on both sides
7
Result of raising a number to an exponent
9
Number divisible only by 1 and itself
10
Line crossing from corner to corner
11
Single numeral from 0 to 9