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
It’s a bit like driving on the left or right side of the road.
In some countries they drive on the left. In some countries they drive on the right.
You *could* functionally change the rules and it wouldn’t really make any difference to safety or quality of life. But the rules are set and agreed upon so that everyone knows what everyone else is doing.
PEMDAS is like deciding (as a country) that people drive on the right side of the road. The rules are set, the infrastructure is built, and everyone who learns to drive learns the same rules so it’s consistent.
If someone independently decided to then drive on the *left* things would get ugly *really* quick lol. Same with math.
So in this example non-PEMDAS would be like driving on the left.
There’s no real reason one is better than the other (although I’m sure many will argue that whichever side they’re used to is the ‘better’ one lol) it’s just what was agreed upon. Same with PEMDAS. It *could* be switched to no real detriment as long as *everyone* made the switch together at the same time.
Which would be a hysterically bad time haha
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