here is the problem:this relates to the system of addition in number

system.......Why is 0-1 =11 in binary or 1+1= 10 in binary

What would 6+7 be in a number system having a base of say 9,& how

will that differ[the value of this addition] when matched vacross another

base say 8 what would 3-2 be in base say4

regards

Sujoy