Across
1
Split into equal parts
3
Result of addition
5
Mathematical rule or equation
6
Exact correspondence on both sides
7
Line segment connecting two circle points
9
Reference line in a graph
Down
2
Rectangular array of numbers
3
Rectangle with four equal sides
4
Repeated addition
5
Part of a whole number
7
Value that does not change
8
Round shape with all points equidistant
9
Math using letters for unknown values