Hi everybody,(adsbygoogle = window.adsbygoogle || []).push({});

I want to ask some things about the order of operation. Of course I have heard and used PEMDAS! First of all i want to make this clear: we say that first we should calculate the parentheses: in order to do so we also use PEMDAS in each parenthesis to calculate it's value? I am almost sure about the answer but just want to confirm it. And the most important thing: how was the "right" order of operations decided? Is it just a convention that always gives right results in connection with the axioms that we have set for addition and multiplication? Can it be proved?

Thank you

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Order of operations

**Physics Forums | Science Articles, Homework Help, Discussion**