What makes non-PEMDAS answers invalid?
It seems to me that even the non-PEMDAS answer to an equation is logical since it fits together either way. If someone could show a non-PEMDAS answer being mathematically invalid then I’d appreciate it.
My teachers never really explained why, they just told us “This is how you do it” and never elaborated.
In: 834
P – Parentheses are an explicit prioritization
E – Exponents are basically repeated multiplication
(MD) – Multiplication is repeated addition and Division is just an inverted multiplication
(AS) – Addition is the most basic operation and Subtraction is just an inverted addition
So it makes sense to do the repeated version of an operation before you do the basic version of the operation
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