Time Teller Travelers

Dear Time Traveler, I am lost in time! I need you to help me figure out what time it is and help me get back to our classroom! 

In this fun new and interactive lesson you personally help me figure out what time it is in a few little riddles that will help you learn how to tell time and get me back to our time.

The first step what time is it? How do you know? How do you say that? What are some other ways to say it?

The second step if you were to add to this time how would you go about doing that? Is there an easier way? 

The third step what happens if you subtract that time? Is the idea a lot like subtracting normal numbers?

Help! Don't rush through this but i need you now time traveler get going and get me out of here!