Question about Texas Instruments TI-83 Plus Calculator

# TI-83 plus problem

When I try to solve, for example, 0.01^2 I receive 1e-4 instead of 0.0001. How to fix this? In the MODE I chose "normal" and "float", but it still not giving me 0.0001

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• Texas Instru... Master

Hello,
The calculator has limitations. No matter what number of decimal places you specify in the floating mode format, If the absolute value of the number is less than 0.001 the number is displayed in scientific format :
[digit][.][digt][digit] ...up to [digit9] [E][-][2 digit exponent].
Here are somme screen capture that show you that.

As you can see the two screens overlap. Floating mode is set to 4 decimal places. As long as the absolute value is less than 0.001, the number is displayed in scientific format. However when that absolute value exceeds 0.001 the display reverts to the floating mode format you want.

When you manipulate very small or very large numbers, the floating point format cannot be used because of the limitations of the screen.
In this last screen capture Floating mode is set at 9 decimal places. I entered the electron charge. The line is pretty full.

Hope it clarifies things for you

Posted on Sep 16, 2009

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• Contributor

This is not a problem. It is standard for all TI-83 calculators. You just have to remember to move the decimal place LEFT (for negative "e"s) the number of the negative that you get.

So:
1e-4 = 0.0001

And
1e4 = 10000

Make sense?

You can't fix it. That's just the way they operate. You can adjust the MODE settings all you want, (don't try the "eng" mode because that's REALLY confusing) it won't change the number. Sorry if this confuses you.

Posted on Sep 10, 2009

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Posted on Jan 02, 2017

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## Related Questions:

### NOT SHOWING NEGATIVE EXPONENTS

Try this if you have parenthesis.
(5*10^-9)*(4,4*10-9).

I'm assuming you are using a comma as the decimal deliminator and are located in Europe. (4,4 instead of the English 4.4).

Your working example also has no spaces between the elements of yoyr formula. Watch this.

Apr 05, 2014 | Texas Instruments TI-83 Plus Calculator

### Ti-83 when I type something on my calculator an E comes up. On my answer Example 200+500 and I press enter and I get 500E0 what can I do

Your calculator's display is set to Engineering notation.

Press MODE. Use the arrow keys to highlight "NORMAL" on the first line and press ENTER. Highlight "FLOAT" on the second line and press ENTER. Press 2ND [QUIT] to exit the mode screen.

Oct 16, 2012 | Texas Instruments TI-83 Plus Calculator

### I have a TI-83+. My calculator keeps putting everything in scientific notation. For example, "9" comes up "9E0". I have tried resetting but it still won't stop doing that.

Press MODE. Use the arrow keys to highlight NORMAL on the first line and press ENTER. Press 2ND [QUIT] to exit the mode screen.

Alternatively, you can set any other display mode on that screen.

Sep 05, 2011 | Texas Instruments TI-83 Plus Calculator

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When you reach the FLOAT line and see the string of numbers 01 234 etc. you are supposed to use the right arrow to highlight one of the numbers in the string of digits. If for example you highlight the number 4 and validate, your results will be displayed with 4 decimal places.

Apr 18, 2011 | Texas Instruments TI-83 Plus Calculator

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Press MODE to bring up the mode screen. Use the arrow keys to highlight "FLOAT" on the second line and press ENTER. Press 2ND [QUIT] to exit the mode screen.

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### Anytime I try to multiply .001X.001, any decimal beginning with a zero, I get an error. For example, .001X.001=1 E-6...My mode is set in normal, and I reset it to default, what am I missing?

This is not an error. .001 multiplied by .001 is 1E-6.

If the absolute value of a number is less than .001, the calculator will always display it in scientific notation. 1E-6 is interpreted as 1 times 10 to the minus sixth power.

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Press MODE to bring up the mode editor. Press down-arrow to go to the second line. Use left/right-arrows to highlight NORMAL. Press ENTER to select it, then 2ND [QUIT] to exit the mode editor.

Alternatively, you can select any other display format.

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### Radian mode does not work properly

-1E-13 is a very small number. When doing this kind of a problem you can regard 1E-13 as 0.

Remember that pi is an irrational number. It is only estimated on your calculator. I just played around with a TI-83 and found the following answers:

cos(pi/2) = 0
cos(2*pi + pi/2) = 0
cos(4*pi + pi/2) = 1E-13
cos(20*pi + pi/2) = -1E-13

As you know, that correct answer to each of these is 0. The calculator gives non-zero answers because some very small errors are accumulating. There is nothing wrong with your calculator.

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### Scientific notation

press menu, there it says science or something like it

set it on float

Oct 31, 2007 | Texas Instruments TI-83 Plus Calculator

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