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re: The Internet finally catches up to the OT, about 10 years late
Posted on 5/31/25 at 8:59 am to Riggle
Posted on 5/31/25 at 8:59 am to Riggle
quote:
As someone who teaches math, this captures why people hate it. The only interesting thing here is unclear notation, which undermines the point of learning math at all
Yes. Throwing in that stupid divide signal just confuses everyone and makes the problem unclear. I don't think I ever used or saw the divide symbol a single time in college (engineering)
Posted on 5/31/25 at 9:05 am to LSUtiger89
quote:
Multiplication denoted by juxtaposition (also known as implied multiplication) creates a visual unit and is often given higher precedence than most other operations. In academic literature, when inline fractions are combined with implied multiplication without explicit parentheses, the multiplication is conventionally
interpreted as having higher precedence than division, so that e.g. 1 / 2n is interpreted to mean 1 / (2 · n) rather than (1 / 2) · n.[2][10][14][15] For instance, the manuscript submission instructions for the Physical Review journals directly state that multiplication has precedence over division,[16] and this is also the convention observed in physics textbooks such as the Course of Theoretical Physics by Landau and Lifshitz[c] and mathematics textbooks such as Concrete Mathematics by Graham, Knuth, and Patashnik.[17] However, some authors recommend against expressions such as a / bc, preferring the explicit use of parenthesis a / (bc).[3] More complicated cases are more ambiguous. For instance, the notation 1 / 2p(a + b) could plausibly mean either 1 / [2p · (a + b)] or [1 / (2p)] · (a + b).[18] Sometimes interpretation depends on context. The Physical Review submission instructions recommend against expressions of the form a / b / c; more explicit expressions (a / b) / c or a / (b / c) are unambiguous.[16] 6÷2(1+2) is interpreted as 6÷(2×(1+2)) by a fx-82MS (upper), and (6÷2)×(1+2) by a TI-83 Plus calculator (lower), respectively. This ambiguity has been the subject of Internet memes such as "8 ÷ 2(2 + 2)", for which there are two conflicting interpretations: 8 ÷ [2 · (2 + 2)] = 1 and (8 ÷ 2) · (2 + 2) = 16.[15][19] Mathematics education researcher Hung-Hsi Wu points out that "one never gets a computation of this type in real life", and calls such contrived examples "a kind of Gotcha! parlor game designed to trap an unsuspecting person by phrasing it in terms of a set of unreasonably convoluted rules".[12]
Posted on 5/31/25 at 10:15 am to jpainter6174
quote:It’s not enough to just say PEMDAS because people forget the left to right part of the MD and just remember the MD order. That’s why it’s so hard for people.
Pemdas
Posted on 5/31/25 at 11:32 am to LegendInMyMind
It may not be, but a I felt real smart when I got 288
Posted on 5/31/25 at 11:38 am to sqerty
quote:
It may not be, but a I felt real smart when I got 288
They have you right where they want you.
Posted on 5/31/25 at 11:39 am to East Coast Band
The answer is 2.....gross.
Posted on 5/31/25 at 11:55 am to LSUtiger89
I watched that mathematician's video.
He said it was the right way to do it because a CALCULATOR said it was. Yeah.
He admitted in the books it would be two because you multiply the 2 by the parenthesis, then divide into 48. also said it was how it used to be.
He said it was the right way to do it because a CALCULATOR said it was. Yeah.
He admitted in the books it would be two because you multiply the 2 by the parenthesis, then divide into 48. also said it was how it used to be.
Posted on 5/31/25 at 11:57 am to East Coast Band
It's not very hard to get to the 24 x 12 part.
Once you get there, you generally learn the multiplication table up to 12 x 12= 144 in elementary school. (At least that's what the multiplication table I learned went up to.) And it's not that hard to calculate in your head that 144 x 2= 288.
You can do this whole thing without a calculator.
Once you get there, you generally learn the multiplication table up to 12 x 12= 144 in elementary school. (At least that's what the multiplication table I learned went up to.) And it's not that hard to calculate in your head that 144 x 2= 288.
You can do this whole thing without a calculator.
This post was edited on 5/31/25 at 12:01 pm
Posted on 5/31/25 at 12:00 pm to UFFan
Guess you didn’t see my posts on the last page. The answer is 2…
I went out to my car, got my laptop, fired up MathCad Prime and…I can make it get 288 as well, but it’s 2.
I went out to my car, got my laptop, fired up MathCad Prime and…I can make it get 288 as well, but it’s 2.
Posted on 5/31/25 at 12:07 pm to East Coast Band
quote:
The Internet finally catches up to the OT, about 10 years late
Pretty sure the OT stole this from the internet at the time.
Posted on 5/31/25 at 12:12 pm to East Coast Band
This math problem was "viral" in 2019. There's a 2019 Business Insider article about this problem.
LINK
I don't think I've seen this math problem since 2019. I had pretty much completely forgotten about this 2019 controversy until the OP refreshed my memory about it.
I don't know why the OP is posting about it now.
LINK
I don't think I've seen this math problem since 2019. I had pretty much completely forgotten about this 2019 controversy until the OP refreshed my memory about it.
I don't know why the OP is posting about it now.
Posted on 5/31/25 at 12:12 pm to roobedoo
quote:
The long horizontal line means you are dividing or taking some number from below the line.
Wrong!
Subtraction is taking from, not division.
Posted on 5/31/25 at 1:09 pm to speedybaw
quote:
How is the answer not 2?
Anyone ever tell you that you have girly hand writing?
Posted on 5/31/25 at 1:30 pm to East Coast Band
That math answer is two gross for me.
Posted on 5/31/25 at 2:18 pm to forkedintheroad
Sorry, in my analogy, you have less whole apples but more pieces.
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