No it isn’t.
Yes, it is.
And you still have to do both
Quote the part where I said you didn't.
They’re equal in value, they’re not the same
They are the same.
You got that the wrong way around. Brackets have only been used in Maths for a few centuries now
- How is that "having it the wrong way around"?
- What does that have to do with the topic at hand? We're talking about maths today, not centuries ago.
And you were wrong every time you said it.
No, they're not.
Not if you left them out of the mnemonic and they didn’t know when to do them
Mnemonic without understanding what you're doing doesn't help. Which is why people get confused and argue online that you must do addition before subtraction, or the other way around, depending on what the mnemonic they learned was.
Understanding that subtraction is just the addition of a negative number solves this problem.
Yes it is.
If you understand what is multiplication and what is addition, then you know what this doesn't suggest ignoring division or subtraction at all.
OK, teach me. What's the result of
2/2and what's the result of2*½?Explain how is that relevant to the discussion. Or to the example I gave, where brackets are only used for readability sake, they're not changing the results in any way. You might as well note that as
-2+2- see? No scary brackets anymore, same result.Well... yes, because we're not talking about the history, we're talking about the current rules.
This whole thread stemmed from the fact that some people were taught PEMDAS while others where taught PEDMAS.
Are you suggesting that the order of operations depends on your maths teacher?
Wow, let me be the first to welcome you to the Internet! I know it might be jarring at first, but give it time and you'll get used to the weirdness! Glad to see you joining!
Great! Now find one that actually talks about that, instead of one that talks about the addition of similar monomials, which is a different thing altogether.
Actually, you know what? Never mind - instead just read the part you posted, but slower. Here, let me highlight the important bit:
"Addition of similar monomials is performed by taking the arithmetical difference between the total of the positive and the total of the negative coefficients, giving it the sign of the numerically greater total, and annexing it to the common literal part"
Which actually reinforces my point.
See? This is exactly what I was talking about. Addition is NOT first, unless it's the first on the right. If subtraction is first, you do subtraction first.
Again, let me extend a warm welcome on behalf of everyone on the Internet. I believe you'll have a great time here.