Answer:
Ctrl+X
When you first select some text and then you press Ctrl button placed to the left bottom corner of your keypad and while keeping it pressed if you press X[and dont bother if your CapsLk is on or off] the selected text willl be cut.
NOTE: IMAGES CAN ALSO BE CUT BUT ONLY WHERE YOU HAVE APPLIED IT, OR INSERTED IT LIKE IN WORD OR POWERPOINT OR GO OOGLE DOCS