I wrote a (very long) blog post about those viral math problems and am looking for feedback, especially from people who are not convinced that the problem is ambiguous.
It’s about a 30min read so thank you in advance if you really take the time to read it, but I think it’s worth it if you joined such discussions in the past, but I’m probably biased because I wrote it :)
Great write up! The answer is use parentheses or fractions and stop wasting everyone’s time 😅
That’s actually a great way of putting it 🤣
Funny how using parentheses gets you the same answer as if implicit multiplication doesn’t have a higher order… It’s almost like considering implicit multiplication as having an advanced order is an invalid assumption to make when looking at a maths equation.
Edit: I’m wrong, read below.
It’s not invalid or even uncommon. It’s just not necessarily correct. Implicit multiplication can be used intentionally to differentiate from explicit multiplication and context can suggest there is a difference in priority. For example, a/bc is likely to be read as a/(bc) because the alternative could be written less ambiguously as ac/b. If I wanted to convey to you that multiplication is associative, I might say ab*c = a*bc, and you’d probably infer that I’m communicating something about the order of operations. But relying on context like this is bad practice, so we always prefer to use parentheses to make it explicit.
It’s only ambiguous if you don’t read left to right. That’s a literacy issue not a mathematics one.
It’s definitely not a mathematics issue. This all concerns only notation, not math. But it’s not a literacy issue either. It’s ambiguous in that the concept of a correct order of operations itself is wrong.
Notation is read left to right, reading it in any other order is automatically incorrect. Just like if you read a sentence out of order you won’t get it’s intention. Like I said, if you actually follow the rules it’s almost like implicit multipication having a higher order doesn’t work, which makes it illigitimate mathematics.
It’s not left to right. a+b*c is unambiguously equal to a+(b*c) and not (a+b)*c.
You determine processing order by order of operations then left to right. Always have. Even in your example, that is the left-most highest order operand, nothing ambiguous about it.
Correct! “implicit multiplication” is NOT a rule of Maths. It’s something made up by those who don’t remember all the actual rules, which includes The Distributive Law and Terms.
It’s not ambiguous - if you correctly follow all the relevant rules of Maths (which includes expanding brackets) then there is only 1 correct answer, 1.
L
…that’s the actual definition given and used in Maths textbooks.
That’s not the “actual definition” and is not even how the standard order of operations would interpret the expression.
Yes it is and yes it is 1917 (ii) - Lennes’ letter (Terms and operators)
Only thing worth reading from you is the hashtag “#LoudlyNotUnderstandingThings”
So, you didn’t understand it? Which part do you want me to explain further?
No it isn’t dotnet.social/@SmartmanApps/110819283738912144