TI 84 Calculator Special Keys

Fraction Button & Fraction Conversion TI 84 Calculator

Yes, your Ti 84 calculator has keystrokes that can convert decimal answers to fractions. This only works if there is a fraction form for your decimal.

In any case, it’s extremely helpful. Some teachers and professors prefer a fraction answer and now you can use your TI 84 to do it.

This even works for rational expressions of complex numbers (image for example).

STO key (STO stores a specific value) TI 84 Calculator Special Keys

You might need to store a value to recall it later. If you’re in physics or chemistry or another science class, this is immensely helpful. Or, if you’re in stats, there might be a specific variable value you need to use again and again. This special key will allow you to save values to specific letters (variables) for future use.

Also, if you want to program your calculator, the STO(re) key is how you create and store values for future calculations or display.

ANS key (second (-) )(recalls last value) TI 84 Calculator Special Keys

Ah, you want to re-use a number you just calculated. Here is how to do it:

Pi, e, i Keys TI 84 Calculator Special Keys

Hey, you want to use an extremely precise estimate of pi? Use the pi key.

Same for e.

Oh, and you want to calculate i or use it in complex number expressions? Yes, you can use the i key. It’s there, right there.

Negative Key (Renders a negative value) TI 84 Calculator Special Keys

So you want to calculate negative 3 +4? Yes, your TI 84 can do it. But, don’t use the minus key. Your calculator won’t like it. Instead, use the negative key.

Problem solved.

Difference Twixt Negative and Minus TI 84 Calculator Special Keys

What? There’s a difference between a minus sign and a negative sign? Yes, there is. And your calculator is unforgiving if you don’t know the difference.

Please watch the video for a better explanation.

Lighten/Darken Screen TI 84 Calculator Special Keys

What? Your screen isn’t bright enough to see clearly? Well, you’ve got a video for that. Watch and brighten your day…or at least your screen.

By Martin

Martin McSweeney is a National Merit Finalist, Pomona College Graduate, and member of MENSA. He has worked at the Center for Talented Youth (Loyola Marymount University campus); Upward Bound (Harvey Mudd campus); various test prep companies; and Whittier High School. Now, Martin helps students of all abilities improve their relationship with math.