I understand that it might be frustrating. So let's try this.
Let's make this a game.

I have a number. And I want you to help me find the biggest and smallest digit in the number.
So I peel off two digits, write them onto cards and hand them to you.
You look at them, then put them away.

I give you two new cards, and so we repeat.

How would you go about finding the biggest and smallest digit?