Basic Tasks for Using your iPad
To delete an app from the Home screen:
Touch and hold the icon of the app you want to delete until it jiggles and an 
appears. 
(After a few seconds an X will appear next to each of the apps you've installed via the App Store.)
Pre-loaded apps can't be deleted.
Tap the to delete the app.
When prompted, select Delete.
Important: Deleting an app from iPad also deletes the documents and data created by the app.
You are not allowed to delete the default applications that came installed on your iPad. These include the Calender, Contacts, iTunes, App Store, Game Center, etc.