Texas Instruments TI-82 Keystroke Manual page 35

30 TI-83 Introduction
eliminated. The cursor should now be resting on this last digit (5) of the old 4.85. Press the DEL key to
delete this character. (Each time the DEL key is pressed, it deletes the character at the cursor position.)
Press ENTER to display the value of the expression, 42.52.
+ ×
Next, suppose we want to evaluate . Notice that we could produce this expression by
3 5 8
editing the last expression we evaluated, but it really looks more like the expression 3+5*7, which we
evaluated some time earlier. One of the nice features of the TI-83 is that it stores as many previous
entries as it can. Press 2nd [ENTRY] once to produce the last expression. Now press 2nd [ENTRY] again.
Note that you now see the next-to-last expression we evaluated. If you press 2nd [ENTRY] one more
time, you will see the expression we evaluated before that, which was 3+5*7. You may now edit this
expression as before to produce 3+5*8. Press ENTER to evaluate it. If you continue to press 2nd
[ENTRY] beyond the calculator's ability to recall previous entries, it will return you to the most recently
evaluated expression.
Clearing the Home screen
By now your Home screen may look pretty full, and the original expressions you entered may have
scrolled off the top of the screen. Any time you want to erase everything on the Home screen, just press
the CLEAR key, located below the arrow keys. If you want to retrieve these erased expressions, you may
still do so by pressing 2nd [ENTRY] as often as needed.