Excel Keyboard Shortcut: Open workbook

Windows shortcut
Ctrl+O
Mac shortcut
+O

Excel Keyboard Shortcut: Create new workbook

Windows shortcut
Ctrl+N
Mac shortcut
+N

Excel Keyboard Shortcut: Open Excel help

Windows shortcut
F1
Mac shortcut
+/

Excel Keyboard Shortcut: Undo last action

Windows shortcut
Ctrl+Z
Mac shortcut
+Z

Excel Keyboard Shortcut: Redo last action

Windows shortcut
Ctrl+Y
Mac shortcut
+Y

Excel Keyboard Shortcut: Copy selected cells

Windows shortcut
Ctrl+C
Mac shortcut
+C

Excel Keyboard Shortcut: Cut selected cells

Windows shortcut
Ctrl+X
Mac shortcut
+X

Excel Keyboard Shortcut: Paste content from clipboard

Windows shortcut
Ctrl+V
Mac shortcut
+V