this post was submitted on 03 Apr 2024
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Science Memes

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submitted 7 months ago by [email protected] to c/[email protected]
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[–] [email protected] 7 points 7 months ago (2 children)

Internalized PEMDAS without knowing it's literally the same thing as BODMAS is exactly the problem!

[–] [email protected] 3 points 7 months ago (1 children)

what in the name of fuck is BODMAS

[–] [email protected] 4 points 7 months ago* (last edited 7 months ago) (2 children)

Same as PEMDAS, except:

Parentheses -> Bracket

Exponent -> Order

Multiplication <-> Division

BODMAS

[–] [email protected] 2 points 7 months ago (1 children)

I learned it as "BEDMAS"

Brackets

Exponents

(You can guess the rest)

But when I learned BEDMAS, my teacher directed us to do implied multiplication before other multiplication/division. Which, as far as I'm aware, is mathematically correct according to the proper order of operations (instead of whatever acronym summary you learned).

Before I get "umm. Acktually"d .... I know that's not the full picture of the order of operations as it should be in mathematics. But for the limited scope I learned of algebra from highschool, AFAIK, this is correct to the point that I have understanding of. I'm not a mathematician, and I work with computers all day long and they do the math for me when I need to do any of it. So higher understanding in my case is not helpful.

[–] SmartmanApps -2 points 7 months ago

AFAIK, this is correct to the point that I have understanding of. I’m not a mathematician

I'm a Maths teacher/tutor. The actual rules are Terms and The Distributive Law. There is no such thing as "implicit multiplication" (which is usually people lumping the 2 separate rules together as one and ending up with wrong answers).

[–] [email protected] 1 points 7 months ago (3 children)

order? how does that make sense? brackets alright ig

[–] [email protected] 3 points 7 months ago* (last edited 7 months ago)

Order is often used to describe exponents when talking about functions and other mathematical properties. In a lot of cases, it's also equivalent to a degree. For example, a function y = x² - 9 is a second-order/degree polynomial.

Alternatively, one could find a second-order rate of a reaction, which means the rate of reaction is proportional to the square of a solution's concentration.

[–] [email protected] 2 points 7 months ago (2 children)

Order of magnitude? Thinking out loud.

[–] [email protected] 4 points 7 months ago* (last edited 7 months ago)

You have the right idea, and you are right in some regards. Generally the order of magnitude is an order of 10. That is, 1350 could be represented as 1.350×10³, so the order of magnitude is the third order of 10, which is 10³ (i.e. some value x×1000).

[–] SmartmanApps 0 points 7 months ago

Order of magnitude?

It's actually short for "to the order of", as in 2 squared is 2 to the order of 2. i.e. same thing as Exponent or Index.

[–] SmartmanApps -1 points 7 months ago

order?

It's actually short for "to the order of", as in 2 squared is 2 to the order of 2. i.e. same thing as Exponent or Index.

[–] [email protected] -1 points 7 months ago* (last edited 7 months ago) (1 children)

I mean ... yea. The exact problem is math is not taught correctly. Order of operations make total logical sense for what the operations are doing.

The problem only arises when people don't come to all of the appropriate conclusions on their own.

[–] SmartmanApps -1 points 7 months ago

The exact problem is math is not taught correctly

Every single Maths textbook I've seen teaches it correctly. The issue is people not remembering what they were taught (and then programming a calculator without checking it first). Calculators