Upper and lower boundary and logic

In the following skills of upper and lower boundaries which include addition, subtraction, multiplication and division we state that you should use logic.

Use your own logic in the next examples

It's just logic.

But what we mean by that is

Addition	Big number	`+`	Big number	`=`	Biggest number
	Small number	`+`	Small number	`=`	Smallest number

Subtraction	Big number	`-`	Small number	`=`	Biggest number
	Small number	`-`	Big number	`=`	Smallest number

Multiplication	Big number	`xx`	Big number	`=`	Biggest number
	Small number	`xx`	Small number	`=`	Smallest number

Division	Big number	`div`	Small number	`=`	Biggest number
	Small number	`div`	Big number	`=`	Smallest number

It's obvious. It's logic. Ask yourself what else could it be?