From the Home screen, tap the .


Enter numbers and arithmetic operators on the Basic panel.
Swipe the Basic panel to the left to open the Advanced panel.
Tap and hold the Calculator’s display to open a Context menu where you can copy what you’ve entered and access other tools.
Tap Clear  to delete the last number or operator you entered. Tap and hold Clear
 to delete the last number or operator you entered. Tap and hold Clear  to delete all of the entered information.
 to delete all of the entered information.
Touch  to view your calculator history. You can touch an entry to calculate it again or edit it.
 to view your calculator history. You can touch an entry to calculate it again or edit it.