Press the number keys to enter numbers as they are.
Enter an operator between variables to ensure that they are handled correctly, particularly for multiplication. For example, to multiply "a" times "b," enter "a x b" as opposed to "ab."
Place a division sign between numbers to indicate a fraction such at "1/4" or "5/10." Press "Enter" after entering the fraction and the TI-Nspire will display it in stacked form.
Press "CTRL" and then the symbol key, which resembles an open book, to access the symbols palette. Press the left and right arrows to move through the different symbols and then press "Enter" to select.
Tap the "CTRL" key and then press the template key ("x") access the templates palette. Move through selection of templates with the arrow keys and then press "Enter" to select.
Type a number you want to assign to a variable. Next, press the "CTRL" key and the "STO" key simultaneously and then type the variable letter. Finally, press "Enter" to store the number in the variable.
Type the letter you want to use as a variable. Next, type the ":" key and then type "=" and then finally type the number you wan to assign to the letter. The result should appear as "a:=5." Press "Enter" to store the variable.
Type the "such that" symbol, or "|" to assign a number to a variable for the expression it is used in. For example, the "y x (y + 1) | y = 6" assigns the number 6 as the value of y for that problem only. After you press "Enter," y is no longer associated with 6.