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Finding lcm and gcf on the ti-30xa

How do you find the lcm and gcf using the ti-30xa

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Posted on Jan 02, 2017

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SOURCE: ok im using the Ti 30xa how do i find the square

1. Type in the number you wish to find the square root of.

2. Press the square root button. It is located to the immediate left of the divide button.

Posted on Nov 13, 2009

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SOURCE: How to use antilog?


As you well know the pH is the negative of the log in base 10 of the H+/H3O+ ion concentration. If we use [H+] to represent that concentration, then pH=-log[H+].
To obtain the [H+] you need to calculate the antilog. You write the definition in the form log[H+] =-pH and then calculate 10 to the power of each member. The equality remains valid as both members are treated similarly. Thus
10^( log[H+] ) = 10^(-pH)
Since raising 10 to a power is the inverse function of taking the log in base 10, 10^(log(x))=log(10^(x)) = x (they are inverse of one another), you are left with


Your calculator has a function [10 to x] accessed by pressing the [2nd] function key. To use it you must enter the negative value of the pH, press the [2nd] function key then the [10 to x], then the = key to get the result (concentration)
Exemple: let the pH=5.5, what is the H+ concentration?
With [(-)] being the change sign key, then
[H+]:[ (-) ] 5.5 [2nd][10 to x] [=]
The result is 0.000003162 or 3.16 x 10^(-6)

Hope it helps.

Posted on Dec 10, 2009

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SOURCE: how do i find the negative log on a TI-30Xa


Ex: calculate -log(15.32)

  1. Calculate the log 15.32 [LOG] [=] result 1.185258765
  2. Then press the change sign key (-) result -1.185258765
You can also try 15.32 [LOG] (-) [=]. Try to veriufy it on your calculator.

Here is a picture of the change signd677d4e.jpg
Hope it helps

Posted on Dec 13, 2009

  • 1 Answer

SOURCE: how to get the square root using a ti-30xa calculator?

hey det44 your a ******* thats on a ******* different calculator ***** ****

Posted on Mar 08, 2010

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SOURCE: I need to use a TI 30Xa to evaluate a Logarithm

Use the relation log5(x) = log(x) / log(5) = ln(x) / ln(5)

LOG ( 1 / 625 ) / LOG 5 =


LN ( 1 / 625 ) / LN 5 =

Posted on Mar 11, 2010

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There are no such buttons, You'll find the lcm (least common multiple) and gcd (greatest common divisor) functions in the MATH NUM menu. Press MATH, right-arrow, and select the desired function.

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How do I convert from decimals to fraction with my TI-30X IIS calculator? I need the step by step process

The following examples will demonstrate how to convert decimals into fractions using the TI-30Xa and TI-30Xa Solar. Please be aware that TI-30Xa Solar School Edition calculators do not have this functionality.

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- Input .25, press [2nd][<--] (says F<>D above it).

** F<>D means fraction to decimal, decimal to fraction.

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Mar 08, 2011 | Texas Instruments TI-30XA Calculator

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Trying to figure out how to do fractions using this

maczbel_1.jpg You can find the entire guide for de TI-30XA following this link:

Mar 05, 2011 | Texas Instruments TI-30XA Calculator

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Can i do sigma notation on a ti-30xa calculator?

No. There are some keys on the TI-30XA that may make you think so, but they are statistical operations. For example, you can enter values using the Sigma+ key and the TI-30XA can give you the sum of the values entered, sum of the squares, mean value, standard deviation and so on.

You cannot do calculations like "Give me the sum of all integers from 1 to 100" with the TI-30XA, you'd need a far more sophisticated calculator.

Jan 06, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

What kind of batteries and where can I find batteries for my TI-30A?

I hope you mean the TI-30XA, since TI never released a TI-30A.

The TI-30XA uses two A76 batteries, also known as 357. You should be able to find them at just about any department, electronics, or office-supply store.

Here's the full scoop on changing batteries:

Oct 21, 2010 | Texas Instruments TI-30XA Calculator

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I have a TI -30XA calculator. Need a battery for it. What is the number of the battery? Thanks, Ed

The TI-30Xa uses two A-76 lithium batteries. Comparable battery model numbers include: Duracell® D357 and Eveready® 357

Sep 23, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Is there a way to calculate LCM and GCF with the Casio fx-9700ge?

There is a program on the Casio website. Here is the link if you want to follow it.

Feb 17, 2010 | Casio FX-9750GPlus Calculator

1 Answer


Hi - You can download the manual by clicking the link underlined in blue below:


See page 10:


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Sep 10, 2008 | Texas Instruments TI-30XA Calculator

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