Lost several shortcuts and an app

Has someone figured out a way to restore app. shortcuts that went missing after upgrading to IOS 6? They are now in my Apps Store and I can open them from there, but I how do I restore them as shortcuts?
Also, the calculator that came installed on my iPhone 4s is now missing completely. How can I get it back?
Thanks. I am sure others are also experiencing these issues.

 

Thanks for your rapid reply. OK, well, I asked Siri to open my calculator and she did. So it is there on the iPhone but I cannot find it unless I ask Siri to open it. I used to have a shortcut for the calculator, as well as shortcuts for several other apps., e.g., Alarm Clock Pro, Motion X GPS Drive, etc. Only one app shortcut still appears on my screen; the other three (including the calculator shortcut) disappeared after I upgraded to iOS6. I tried asking Siri to "create a shortcut for my calculator," and "create an icon for my calculator" but she does not know what I mean. By shortcuts, I mean the icon that represents the app. which used to be on my home screen. All I had to do was tap it and the app would open. Now I have to go to the App Store and open it from there. Why the extra step with iOS 6?

 

OK, that did the trick. Now I feel silly. I never thought to swipe to a third "page" on my screen. The missing shortcut apps were all there, including the calculator. I got confused because before upgrading to iOS 6, they were all on the second page, so to speak. Thanks for clearing this up for me.