Question about Texas Instruments TI-83 Plus Calculator

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My TI-83 calculator is giving me answers that are wrong by about .08 to .15 I am positive that i am entering the equations in the right way. I have the answers to the problems so i know that the answers its giving me are off by a small amount. The calculator is also reset, set to degree, and float, as i saw those were some of the fixes google brought up. Thank you.

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  • kakima Mar 09, 2011

    Could you post an example or two? Without knowing what you're trying to do, it's all but impossible to tell what's wrong.

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  • 61 Answers

Try reseting your calculator if needed, and sometimes answers can be off because the calculator sometimes is so precise you answers may be rounded.

Posted on Mar 10, 2011

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My TI-83 plus seems to give me the wrong answer if I type in the problem: 1400/(60*24) The answer should be 1, but I keep getting .9722222. I don't understand why it keeps giving me the wrong...


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in order to give the calculator a function to graph, you will want to enter the y= window by pressing the top left most button on the calculator. nintenman1.gif a menu similar to the one above will open, wherein you can enter an equation for the calculator to graph, such as (x^2-2). On the ti-83 itself, you can enter up to 9 equations to be graphed at once. after that, you may want to go to the window menu, where you can set the dimensions of the graphing plane in both the x row and y column. to view the graph, press the top right most button on the device.
hope that helps :)

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You can download a Guidebook from http://education.ti.com

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1 Answer

How to use the texas instruments ti 83 plus


Srry my friend the ti 83 is no magnificent Ti-89. meaning: you have to solve it yourself. There is a method for graphing though. Set the equation equal to zero and then plug the stuff on the other side of the equation into a graph by pressing y= and then typing it in. Then hit graph. Wait for the graph and then hit 2nd calc and select zeros. Bring your cursor using hte arrow keys close to where the line hits the x axis and press enter and then do the same except to the right of that point and then press enter twice and it will display the y which should be the answer
There are quadratic formulas for calculators programmed in tibasic for the calc but other than that there is no way to solve it

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