Across
1
Total distance around a shape
3
System of ordered marks for measuring
5
Line touching circle at one point
6
Number less than zero
Down
1
Closed shape with straight sides
2
Difference between highest and lowest values
3
Result of addition
4
Math using letters for unknown values
7
Comparison of two quantities
8
Number with digits after a point
9
Single numeral from 0 to 9