Question about Texas Instruments TI-30XA Calculator

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Does not display numbers WHEN looking at the display area NORMAL position

Bought in 11/02/07. I can see the numbers on the display area when looking directly at it; however, I can see only see the numbers when the calculator is moved foward, and I look at the numbers from about display area from about 45 deg. behind the calculator. I rarely used it. Why can't it display numbers at normal position? Why move about a foot foward and my eyes at 45d deg. then I can see the numbers? Do I need to get new battery?

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Re: does not display numbers WHEN looking at the display...

I would say new batteries or a new calculator.

Posted on Mar 04, 2008

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What does positive integer mean

any counting numbers. whole numbers is a positive integer. zero is normally not considered a positive integer.

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Why is it that small decimal numbers only show in exponents instead of a long decimal number?

The calculator has three display formats for results: Normal, Scientific, and Engineering. It is possible that your calculator is configured to display results in Scientific Format.
Press the MODE button. On the first line, highlight Normal. After that you can use the Down Arrow to move cursor to the second line and highlight FLOAT.

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How do I change from having the answers displayed in scientific notation to normal number display?

You can set your display mode to FIX or NORMAL ( 1 or 2) if you have them. However if the result is too small ( less then 0.001) or too large the calculator will use the scientific format. Generally if there are not enough display positions to show your result, the calculator uses scientific notation.

Jul 04, 2011 | Casio FX-260 Calculator

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The left side of our ti-84 will not display after

Would it help if I told you that all the precision you are apparently looking for has no meaning?. In any number resulting from a scientific calculation only a limited number of digits are truly significant.
If you are entering characters (numbers, symbols, letters, etc.) the calculator keeps accepting them until its memory is full. At this point the cursor changes and go from a solid rectangle to a checkerboard-like rectangle, and you cannot enter anything anymore.

But if you are calculating some meaningful expression, the calculator displays the result according to the display mode you selected: Normal, Scientific, or Engineering). However, even in normal mode, if a number is too small, or too large, the calculator displays it in scientific format.

Scientific format
This format is as follows
  1. A minus sign if result is negative. If positive (+) is omitted.
  2. One digit
  3. Decimal mark (.) or (,) according to configuration
  4. A certain number of decimal digits (maximum 9)
  5. The E to symbolize ( times 10 to the power of)
  6. A minus sign (if exponent is negative), nothing if positive
  7. A maximum of 2 digits for the exponent of the power of 10. The maximum exponent you can have is 99
Let us count the number of possible characters in a display
-1.123456789E-12. That is 16 character slots.
Try playing with the number 987654321123456. All you will see is 9876543211E12. The 23456 sequence disappears, and all that "precision" is lost. Why, may I ask, should you worry that your calculator is not displaying more that 13 characters on the left.

This is what I understood from your one-liner of a question. And because it is a rather cryptic one-liner, I may have gotten the whole problem wrong. If that be the case, do not just shoot down the answer, post a comment to the solution describing what you are trying to do. If it is a bona fide worthwhile concern, I will do my best to help you with it. If on the other hand, it is jus plain idle doodling I will leave it at that.

Dec 19, 2009 | Texas Instruments TI-84 Plus Calculator

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My TI-86 answers every problem with an E answer. example: 3*3=9E0 How do I make it stop doing this? This has always been a great calc till it started doing this.

It is still a great calculator and what it is doing now is not the result of a defect. Rather, it is a configuration setting that someone has activated.
The calculator has three display modes for the numbers.
Standard 'normal', scientific and engineering. The calculator respects the user's choice as long as possible, but if the numbers are too small or two large it uses the scientific display format.
To set the 'normal' display format:
  1. Press [2nd][MODE]. On first line of screen that is displayed, make sure that Normal is highlighted. If it si not, use the arrow to move cursor on it and press [ENTER].
  2. Use arrow to move cursor to 2nd line. Highlight the number of decimal digits you want (0, 1, 2, ...,or 9) and press ENTER.
  3. Quit the MODE setting. From now on the calculator will use the 'normal' display format with the number of decimal digits you chose, until you change this setting again.
  4. However if the number displayed is too small or too large it will be display it in scientific exponential notation. Subsequent numbers that are not too small nor too large will obey the 'normal' format.
Hope it helps.

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Need help on scientific notation using a texas instrumants ti-83

still have problem's mail me at

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I cant divide simple numbers like 0.16/30 i get crazy numbers like 5.333333333x10-3 how do i fix it?

The numbers are not crazy: The calculator uses the Exponential Format if the number to be displayed is too small. What it means is as follows:
5.33... x10^(-3) = 0.0053333: Notice that the digit before the decimal point is at the third position after the decimal point.
in 5.333..x10^(-4) = 0.0005333 it is at the fourth position after the point.

Use the FIX display format and set the number of decimal digits to be displayed to be 2 o 3 or more depending on your needs. Instructions are on screen capture below.

Hope it helps.

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I cant make the decimal mode work (5000=50.00)

At the top of the keypad area, there is a switch with the following above it: +023F. Leave the switch in the + position and it should automatically place the decimal 2 postions, i.e. enter 5000 and the display will show up 50.00.

Apr 11, 2009 | Canon P23-DHV Calculator

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Sharp el506d calculator has the decimal in the wrong place.

Try pressing the FSE button to switch between Fixed, Scientific, Engineering, and Normal displays. When in Fixed display, you can use <2ndF> < TAB > then enter a number from 0 to 9 to choose the number of decimal places in that display. To reset EVERYTHING to factory defaults: With the calculator off, press and hold these three keys: <2ndF> < ) > < ON/C > then release all three. The calculator will go through a series of tests (it takes a few seconds) and then be at its factory defaults. I have uploaded the manual for this calculator at

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