I think I hit the EEX key and now my calculator will not clear. I put in 5280 then enter 5280 x and the answer was 5280.0000

How do I clear it?

Thank you

Jonalyn Young

1-559-292-0296

My mother worked for HP in the 60's - 80's and when I became a banker she gave me one of the first HP 12c's. One of the things we first noticed was how quickly we went through batteries, or so we thought that was the reason why the calculator was giving us wrong answers.

My mother came up with a solution which I still use today. If you have tried all known solutions, __turn off the calculator__ and take the cover off the battery and remove the battery. Using a standard paperclip, stretch out the clip so that you can touch both sides of the metal casing where the battery normally sits (sometimes you have to tough the casing and then something metal outside the casing). The best way I can explain, is that it is like grounding out an older car alternater. Put the battery back; put the cover back on, turn on the calculator. If you get a

__"Pr Error"__ message this is good news. Simply select the CLX key and life is wonderful again.

Don’t ask me why this works …. But what the heck …. It’s been working for me for years. Good Luck

Sherry-Lee and Winston the Super Rescued Dog by the Sea

Posted on Nov 17, 2008

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Posted on Jan 02, 2017

HP lists on their site (and in user manual) a way to run a key test to see which keys are bad. I'd start there.Type "hp 12c key test" into your search window on your browser and the first thing that comes up should answer it. Took me about 4 seconds to find this.

Sep 06, 2014 | HP Calculators Hp12c Finance Calculator

Use the square root function. It's the g-shifted function of the 1/x key (second key from the left on the second row).

May 14, 2014 | HP 12c Calculator

I take it you mean a 12C Platinum.

Press f ALG. ALG is the f-shifted function of the EEX key, just above the double-size ENTER key. This will switch the 12C Platinum from RPN mode to Algebraic mode, and ALG indicator will light up instead of the RPN indicator.

To switch back to RPN, press f RPN. RPN is the f-shifted function of the CHS key just above the EEX key.

Press f ALG. ALG is the f-shifted function of the EEX key, just above the double-size ENTER key. This will switch the 12C Platinum from RPN mode to Algebraic mode, and ALG indicator will light up instead of the RPN indicator.

To switch back to RPN, press f RPN. RPN is the f-shifted function of the CHS key just above the EEX key.

Apr 23, 2014 | HP 12c Calculator

Press f ALG to switch to the Algebraic mode.

ALG is the shifted function of the EEX key.

ALG is the shifted function of the EEX key.

Mar 17, 2014 | HP 12c Calculator

Using the general power key marked **[X^y], [Y^x], or [^]** : Enter 10[^]**[(-)]**8, where **[(-)]** is the change sign key.

Using the Enter Exponent key, marked**[EE], [EEX], [Exp] or **[ times (*) 10 to the x] : you type in** 10[EE][(-)]8**

Using the Enter Exponent key, marked

Oct 01, 2013 | Texas Instruments TI-30XA Calculator

It's right above the double-height ENTER key in the center of the keyboard.

Jul 30, 2013 | HP Calculators Hp12c Finance Calculator

It indicates that the calculator is set for compound interest on the odd period instead of simple interest. To toggle this setting press STO EEX.

Jun 02, 2012 | HP Calculators Hp12c Finance Calculator

To switch the payment mode from the beginning of the period to the end of the period, press g [END].

To switch the interest on the odd period between compound and simple, press STO EEX.

To switch the interest on the odd period between compound and simple, press STO EEX.

Apr 23, 2011 | HP 12c Calculator

The EEX key is used to enter the exponent of a power of 10. To raise e (the base of natural logarithms) to a power (exponentiation) press [g][e^x]: You enter a number (the exponent) then [g][e^x] and the result will be displayed.

Jun 15, 2010 | HP 12c Calculator

Turn the calculator off. Hold down the period (decimal) key and hit the "ON" button at the same time.

Mar 03, 2010 | HP 12c Calculator

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