Question about Texas Instruments TI-84 Plus Calculator

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Negative Key I cannot find the negative key on this thing. It says to press (-), but it's not on there.

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  • Anonymous Sep 21, 2008

    me 2 i have the exact same prob


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Its on there its at the very botton of your calculate by the enter key between enver and the decimal

Posted on Sep 03, 2008

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HP35s minus sign display is incorrect

The minus is always centered while the negative is always at the top.

If you're in algebraic mode, press 1 - 2
You should see the centered minus sign between the one and the two. Now press ENTER, and you should see the top negative preceding a one.

The two are two different things. The first indicates subtracting one number from another. The second indicates a negative quantity.

Are you sure the minus is at the top? Or was the negative centered?

Nov 08, 2013 | HP 35s Scientific Calculator

2 Answers

Why can't I multiply negative numbers on my El-520x???

Make sure you use the +/- key (located just to the right of the decimal point key) to enter a negative number, not the - key (to the right of the + key, used to subtract one value from another).

For example, press +/- 4 / +/- 3 = to divide -4 by -3 .

Jan 19, 2013 | Sharp EL-520XBWH Scientific Calculator -...

1 Answer

Cannot calculate antilog value for negative numbers . Example: antilog(-5)

Make sure you use the (-) key to enter negative values, not the - key. For example, to calculate the common antilog of -5, press
SHIFT log (-) 5 =

To calculate the natural antilog of -5, press
SHIFT ln (-) 5 =

Apr 30, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How would type in scientific notation?

Use the EE key (just above the 7 key) to enter an exponent. For a negative exponent, use the +- key (just to the right of the decimal point key) to enter the negative sign.

For example, to enter 1.2 x 10^-21, press 1 . 2 EE +- 2 1

To switch the display mode to scientific notation, press 2nd [SCI] (the 5 key).

Jan 10, 2011 | Texas Instruments TI-30XA Calculator

2 Answers

Converting negative deg F to deg C produces conversion error

If your measurement are negative use parentheses such as, (-4) degrees Fahrenheit converted to Celsius should = -20. Where as 4 degrees Fahrenheit equals -15.5 degrees Celsius. the parentheses are not needed if your measurement is positive.

Dec 20, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Negative log

Use the log function (common logarithm). See screen capture for markings on key.
To evaluate the negative of a logarithm
Enter the number (argument) of the logarithm
Press the = key to have it calculated.
While result is still displayed, press the sign change key or (+/-).

Beware that -log(number) is not necessarily a negative value.

Another way to calculate -log is to use the relation
log(1/a)=-log(a) .

Your example

3 [EXP] [(] [+/-] 2 [) ] [LOG][=] [+/-]

[EXP] is the key to enter exponent of a power of 10 :It is a shortcut, so no 10 is entered. Respect the key sequence above.
[ (] left parenthesis to prevent ambiguity due to the negaticve exponent. Just a security.
[)] is the enclosing right parenthesis
[+/-] is the Sign Change key

May 06, 2010 | Casio FX-260 Calculator

1 Answer

How do i make the log button negative?

Enter the number, then press the LOG button. Once result is displyed press the change sign key. If result is positive, it will become negative. If result is negative it will become positive. The Change sign key is the one with + -, located between the . and the = on the bottom row of keys.

Apr 01, 2010 | Texas Instruments TI-30XA Calculator

2 Answers


You can download the guidebook for this calculator from TI here.

From page 16:
To enter a number in scientific notation:
1) Enter up to 10 digits for the base (mantissa). If negative, press the +/- key. (The key has two curvy arrows between the + and - but I can't do that on my keyboard.)
2) Press the EE key.
3) Enter a 1 or 2-digit exponent. If negative, press +/- either before or after entering exponent.

They give the example 1.2345 +/- EE +/- 65 which would display -1.2345 -65.

Apr 07, 2009 | Texas Instruments TI-30XA Calculator

4 Answers

How do you enter negative numbers on a TI-30X iis calculater?

On the bottom of the calculator near the zero and the enter key it has the symbol (-) that is a negative number symbol

Nov 22, 2008 | Texas Instruments TI-30XA Calculator

1 Answer

How do I get a negative number?

  1. Press the fourth bottom grey key.  It has a + and -  in it with some arrows right next to a green key.

Nov 07, 2008 | Texas Instruments TI-30XA Calculator

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