Question about Texas Instruments TI-81 Calculator

2 Answers

Need to purchase new TI -81 Calculator

Since last ten years i am using TI- 81 calculator. Can you let me know from where we can purchase this calculator. I am situated in Mumbai - India.

you can contact Rukhshana
tel : 0091 22 2218 1098
email : rukhshana.guard@makers.co.in

i need to purchase this calculator as the one i am ussing is in almost in nonworking stage.

please let us know ASAP

thanks.

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2 Answers

Ebay, bought one for under 14 with shipping today

Posted on Feb 11, 2008

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1 Answer

Who invented this calculator and where it came from?


The first graphing calculator was invented by Casio Computers. of Japan in 1985 It was the Casio FX-7000.The lead engineer on the Casio 7000 development team was Hideshi Fukaya. About 5 years later, Texas Instruments introduced its first .
The Ti 84 Plus was introduced in 2004. Before the TI 84 plus there werer other graphing calculators by TI: 80/81/82/83/85/86/92/73

Aug 28, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

My TI-81 screen is so faint. How do I make it


Turn the calculator on. Press and release the 2ND key. Press and hold the up-arrow key to darken the screen/increase the contrast.

Obviously, to go the other way you use the down-arrow key instead of the up-arrow.

Apr 23, 2010 | Texas Instruments TI-81 Calculator

1 Answer

I have a TI-81 that stop working, I installed the


TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on at all. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

Mar 16, 2010 | Texas Instruments TI-81 Calculator

1 Answer

I need to know how to convert decimals to fraction on my TI-81 texas instrument.


Unfortunately the TI-81, unlike later models, does not have this capability built-in. You'll have to find and load a program to do this.

Oct 23, 2009 | Texas Instruments TI-81 Calculator

1 Answer

How do i enter 35 degrees 20 minutes into my TI-81 calculator


As far as I know, the TI-81 doesn't have a degree-minute-second entry mode the later TIs have. But to answer your question, you can always do it as:
 35 + 20 / 60
followed by ENTER if needed.

If you're in Radian mode instead of Degree mode, you'd have to follow up with MATH 6 to specify degrees instead of radians.

Sep 29, 2009 | Texas Instruments TI-81 Calculator

1 Answer

Grandaughter gave me her TI-81. I replaced all


TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

Sep 09, 2009 | Texas Instruments TI-81 Calculator

1 Answer

How to use get the power (five to the fourth power)


Use the ^ key just above the divide. For example, 5 ^ 4 ENTER should give you 625.

Mar 27, 2009 | Texas Instruments TI-81 Calculator

1 Answer

Numerical keys are not working


I have the answer! GET A NEW CALCULATER...a calculator i don't think should last 8 years if u use it often...

Feb 01, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Fractions


You must use decimals. Like 1/2 = .5 3/4 = .75

Feb 13, 2008 | Texas Instruments TI-81 Calculator

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