Undo
Whenever something unexpected happens, you can press the "undo" button to get back to the previous state and try again.
Whenever something unexpected happens, you can press the "undo" button to get back to the previous state and try again.
If you have just entered a complex math expression but made a mistake in it, you may not want to use "undo" and retype the whole expression. Instead, tap the circle next to the expression to bring up the keyboard and correct it.