Question about Texas Instruments TI-30XA Calculator

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EE button ("enter exponent" button) Retuns Wrong Value

On TI-30xA when I use the EE button, it returns an incorrect value when I hit "=" to go to decimal form. It appears this is only true with negative exponents.

For instance: key stroke sequence: 10, [EE], 5, -, returns as .0001

We all know this should be .00001. This can cause great errors, espcially since this is one of a few allowed calculators on standardized tests such as the Professional Engineers Exam.

Note if you hit 10, [y^x], 5,-, key sequence you get the right values.

Can anyone else with a TI-30Xa confirm my problem. Is it a software error that all TI's will have? Or did I get a "lemon"?

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  • maverick_tlc Mar 12, 2009

    I think I figured it out. Looking at another calculators user manual it says "EE" assumes you are already multiplying x 10^x

    so to use the EE button, I should just put in 1, not 10. The TI user manual doesn't say this button functions as a "shortcut" to scientific notation, it just shows using it to enter exponents, but now that I think about it, on my graphing calculator pushing the EE button did short-circuit the key strokes of scientific notation.

    Oh well... solved my own problem. Maybe some other people will learn to be carefull using this key since it is not properly explained in the user manual for this calculator.

  • Anonymous Mar 27, 2014

    ee button doesn't work for exponents



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I dont think you got a lemon.
You acn always enter the powers of 10 as 10, [y^x], but is is less efficient than the EE key
This EE representation is a shortcut.
If you want 10 to the 5th power you just enter [2nd] [EE] 5 and the calculator displays 100000. Of course if you need any other number multiplying the power of ten you enter the following e.g. 2.677[x][2nd][EE]5.

You will not get any error with a positive exponent. But if your exponent is negative you should use the change signe key to the left of ENTER and symbolized by (-)

To avoid all errors I would use parentheses to enclose my exponent.

Here is how to explain the seemingly erroneous result

10 [EE] 5 ) (-) is interpreted by your calculator as 10x(10^(-5)) which evaluates correctly to 0.0001 because [EE] by itself stands for 10^ .

Hope it clarifies this point for you.

By the way some new calculators (Casio) don't have this EE key. Instead you find a key labeled x10^X .

Hope it helps

Posted on Aug 19, 2009

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You're pressing the wrong key. If you want a negative exponent, use the change-sign key ([+<>-] is the closest I can come to drawing the key here), not the subtract key.

Posted on Feb 05, 2010


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1 Answer

How can i enter a decimal exponent in ti -30xa

Use the EE key located just above the 7 key. For example, to enter 1.2 times ten to the 4th power, press 1 . 2 EE 4

Make sure you use the +()- key located to the right of the decimal point key to enter negative values.

Feb 14, 2011 | Texas Instruments TI-30XA Calculator

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I have the 30xa and when i type in exponents and use the ee key it gives me th wrong value. for ex if I type in 10 EE 3 it gives me 10000 instead of 1000.

10EE3 is supposed to be 10000. 10EE3 is 10 times 10 to the third, which is 10 to the fourth. If you want 1 times 10 to the third, enter it as 1 EE 3, which will give you 1000.

Feb 11, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How can I enter into my calculator exponents like (1.09 x 10-6)

Use the EE key just above the 7 key to enter exponents. Use the +/- key to the right of the decimal point to enter negative values. For 1.09 x 10-6, press
1 . 0 9 EE +/- 6

Nov 19, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

I am trying to figure out how to enter negative logs into the TI-30XA. I have a chemistry exam on Tuesday and we need to be able to do problems with the negative log and I can't seem to find any...

Use the +- key to the right of the decimal point to enter negative values and to change the sign of an existing value. For your sample:
2 EE +- 3 LOG +- =

Nov 15, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

How would you do negative exponents for scientific notation? example: (6.0 x 10^6)(2.0 x 10^4), I am required to use the EE button for my exponents since it's a scientific notation equation but I do not...

Use the (-) key for negative numbers (not just exponents) instead of the - key. The - is to subtract one value from another, (-) is to input a negative value.

Sep 09, 2010 | Texas Instruments TI-30XA Calculator

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How would I enter the following on this calculator? 9.1 EE -31 ? 1 EE 3

Do it exactly as you wrote it. For the negative exponent use the change sign key [ -]. The question is whether you are aware of the meaning of the EE key.
The EE key is a shortcut for x10^. Thus 1EE3=10^3=1000.
As to the other number (the electron mass) its value is 9.1x10^(-31) kg which you enter as you typed it 9.1 [EE] [( -)]31 [=]

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

1 Answer

How do you enter exponents on a ti-30xa calculator?

Use the key marked "EE" (for Enter Exponent). For example, to enter 1.2 times 10 to the 17th, press 1 . 2 EE 1 7

Feb 07, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Inputing Scientific Numbers

If you mean using the "EE" key it's straightforward.

To enter scientific numbers, enter the number, then press EE, then the exponent value. The TI-30XA will stay in scientific display until you "clear" or turn it off. It will also switch to scientific notation if you multiply big numbers that exceed the display.

E.g. Input 3, EE, 10, X, 3, EE, 10, =, gives you the answer 9 times 10 to the power 20. Press the "square root" key and you will get back 3 times 10 to the power 10.

You can mix entries too, e.g. 3, EE, 10, X, 2, =, gives you 6 times 10 the power 10....

Nov 29, 2008 | Texas Instruments TI-30XA Calculator

2 Answers

Scientific notation

You have to use the EE button right next to the parenthesis and the sigma plus button. So 1.7 EE and then your exponenet. If it is a negative exponent you need to hit the negative button before you type in the number.

Mar 24, 2008 | Texas Instruments TI-30XA Calculator

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