Across
1
Single numeral from 0 to 9
2
Math using letters for unknown values
4
Value that does not change
5
Result of addition
11
Steepness of a line
Down
2
Reference line in a graph
3
Result of multiplication
6
Repeated addition
7
Symbol representing unknown value
8
Part of a circle's circumference
9
Part of a line with two endpoints
10
Line crossing from corner to corner