I have questions about the number systems which confused me.
As all we know we are using decimal system and also we can talk about natural numbers, integers and so on. Could we talk about natural numbers in for example in quinary system?
additional question : in quinary system we say the least number with two digits is $(10)_5$, but why we didn't write down as $-(44)_5$ ? i don't know if it is $-(44)_5$ ? or $(-44)_5$ ? sorry for bad langugage , thanks in advance :)