You press the SHIFT button and then you press the x10 button.
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the pi button always located on the top of 'EXP' button.
I have not yet come across a calculator with a single button for pi, but pi equals 22 divided by 7(3.142...). Hope I helped.
Most likely, it means Standard Deviation. which is used in analyzing a set of data. See related link.* * * * *The Casio range, popular with GCSE and A level students in the UK, has a button marked SD. This is a toggle between decimal (D) and standard (S) form (fraction, pi).
You have to use pi bc the circle full length is 3.14 but that is a regular term people use to multiple without a calculator
Most calculators use the rounded-off version of pi, which is 3.14159265 (eight significant digits are more than most math problems will require).