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How do I enter negative number in TI 89 - Texas Instruments TI-89 Calculator

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Use the (-) key next to the decimal point key to enter negative values. The - key is to subtract one value from another.

Posted on Nov 06, 2010


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SOURCE: 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

Posted on May 01, 2009

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SOURCE: i have TI-30xs calculator how do I enter negative numbers

Use the change sign key marked (-) or +/-. Press the (-) key then the number.

Posted on Jun 24, 2012

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How can i see the real number pi in decimals in my ti-89?

To get a numerical value for a single result, press the diamond button then the ENTER button. To have all results come out numerically, press MODE F2, scroll down to the Exact/Approx line, right-arrow, select 3:APPROXIMATE, then press ENTER ENTER.

Dec 26, 2012 | Texas Instruments TI-89 Calculator

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How do i graph a vertical line (i.e. x=1) on a TI-89?

Press the 'Home' button, then press 'Catalog'. Scroll down to 'LineVert', press 'Enter'. Now enter a number for your vertical line, then press 'Enter' again.

Oct 13, 2010 | Texas Instruments TI-89 Calculator

1 Answer

Okay... my Ti-89 isn't squaring numbers right. I put in -2^2 and I get -4, or I put -3^2 and I get -9 and so forth. I thought and still believe that when you square any number, despite whether it's...

You are not using the right syntax. It has to do with priority of operations. raising a number to a power has priority over the negation sign (the change sign key). Th operations you are performing are treated as follows.
1. The square of 2 is calculated first (4),
2. then the negation (change sign) is performed, giving -4.

To get what you intend, namely the square of a negative number, you should enter the calculation as follows.
Since the parentheses have priority over everything else, the negation of 2 is calculated first, giving -2, then the power is performed next, and the result should be 4

If you need convincing, here is a screen capture.


Hope it helps.

Oct 26, 2009 | Texas Instruments TI-89 Calculator

3 Answers

How I can get the log base 10 number in a TI 89

"♦" "7" will give you log base 10 for the texas instuments TI-89 Titanium

Feb 20, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Negitive powers

Use the ^ key to insert a power (it's located above the division key) then put a negative power by typing the negative key (located at the very bottom right of the keypad next to the ENTER key) and then the number of the power.


If this doesn't give the right result, put the negative power in parentheses. I can't remember off hand if you need to do that or not.


Jan 10, 2009 | Texas Instruments TI-89 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

2 Answers

Different answer fro my TI-89 AND MY tI-81

Your TI81 can only perform numerical calculation: It always give uour numbers. The TI89, a more sophisticated calculator, can of course do numerical calculation, BUT ALSO symbolic ones. You ask it for the derivative of sin(x) and it will give you cos(x).
Anyway, if you want a decimal result for you calculation above one of the numbers must have a decimal point (instead of writing 2PI write 2.PI.

The TI 89 can do exact calculations. But if you want approximate results any number in the sequence of operations must have the mark of a decimal. Numbers without decimal marks are considered integers, Integer numbers with a decimal mark are treated as floating point numbers ( meaning decimal).

Hope it clarifies things for you.

Nov 15, 2008 | Texas Instruments TI-89 Calculator

1 Answer

Will not power on ti-89

Make sure you have the batteries in correctly. They alternate
negative, positive, negative, positive. First time I put them in I got it wrong too.

Sep 13, 2008 | Texas Instruments TI-89 Calculator

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