like how does it make sense? why is it correct compared to just solving equations left to right? what are some scenarios that prove PEMDAS to be the absolute truth and necessity? @_@
In: Mathematics
It’s doesn’t have to be. It’s just what mathematicians decided.
However it makes sense. Parenthesis groups stuff together so it makes sense to do that stuff first before it interacts with stuff outside. Multiplication is shorthand for repeat addition so it makes sense to do that first before adding another number in (meaning 6•3+2 is just shorthand for 6+6+6+2, so it doesn’t make sense to change it to 6•5).
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