Across
1
Closed shape with straight sides
5
Value that does not change
6
System of ordered marks for measuring
7
Number divisible only by 1 and itself
9
Comparison of two quantities
Down
1
Result of raising a number to an exponent
2
Number less than zero
3
The number representing nothing
4
Part of a whole number
8
Reference line in a graph
10
Repeated addition
11
Number that divides evenly into another