Please help me with subway ticket

Let's say I have 3 day ticket for inner circle.

But during one of the three days I need to go out to the outer circle.

Is there a special ticket for this?
What kind of ticket should I buy?

Thank you

Reply by Marion

Actually there is no special ticket, it depends where you need to go and how often.

The easiest way is probably to buy a "single ticket" for the one trip you need to do outside the inner circle.

You can find more information about public transport prices and stations here.