Across
1
Repeated addition
3
Difference between highest and lowest values
5
Rectangle with four equal sides
6
Value that does not change
9
Rectangular array of numbers
Down
2
Number divisible only by 1 and itself
4
Line crossing from corner to corner
7
System of ordered marks for measuring
8
Part of a whole number
10
Proven mathematical statement
11
Number that divides evenly into another
12
Line touching circle at one point