Is it correct?

[Unregistered]

In mathemethics I want to say a sentence but I do not know how can I write it. This is:

Variable A varies from 1 to 10. So its deviation is 9 (10-1).

Deviation is good?

[David L.]

In mathemathics, I want to write a sentence. Is this correct:?


Variable A has values from 1 to 10, so the range is 9 (10 minus 1).