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phillies91
Posts: 1
Member Since: ‎05-01-2014
Message 1 of 2 (146 Views)

HP 12C Calculator

My HP 12C calculator is not calculating correctly. For example, when I type in a simple equasion such as 5*6 I get 36, or 2*9 gives me 81. I am not exactly sure if I hit a button by mistake which is causing the calculator to do this, or if something is not working correctly. Any insights are appreciated it!

Master's Graduate
BartdB
Posts: 442
Member Since: ‎08-10-2010
Message 2 of 2 (136 Views)

Re: HP 12C Calculator

Hi,

The 12C uses RPN entry for calculations, so 5*6 is done as:
5 Enter 6 *

and 2*9 is done as:
2 Enter 9 *

This might seem cumbersome at first, but works well for longer expressions.

I suggest you read the following:
http://www.hpmuseum.org/rpn.htm

and especially the section "learning RPN":
http://www.hpmuseum.org/rpn.htm#learn

Hope this helps.
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Note, I do not work for HP, I just like playing with calculators :-)
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