Insert, delete, and copy cells in MS-EXCEL

CTRL+C
Copy the selected cells.
CTRL+C, immediately followed by another CTRL+C
Display the Microsoft Office Clipboard (multiple copy and paste).
CTRL+X
Cut the selected cells.
CTRL+V
Paste copied cells.
DELETE
Clear the contents of the selected cells.
CTRL+HYPHEN
Delete the selected cells.
CTRL+SHIFT+PLUS SIGN
Insert blank cells.