Texas Instruments TI-30 XIIS Calculator "negative sign 30xs" Questions

i have TI-30xs calculator how do I enter negative numbers how do I enter a negative number on this calculator Use the change sign key marked (-) or +/-. Press the (-) key then the number.

is there a change sign key on the TI 30XS calculator? cant find a key to change numbers from positive to negative The key is marked (-) and is just to the right of the decimal point key.

absolute value function + TI-30XS There isn't one. You have to use the old eyeball. If the number on the screen is positive, leave it alone. If it's negative, change the sign.