P.S.
“We do it like that, therefore, it is right”
Yep, Maths teachers do it right. :-)
P.S.
“We do it like that, therefore, it is right”
Yep, Maths teachers do it right. :-)
You’re just another yank
BWAHAHAHA! I see you still didn’t learn to check facts first. 😂😂😂
X times 10 is 10x
10x is 9.9999999…
As I said, they didn’t substitute on both sides, only one, thus breaking the rules around rearranging algebra. Anything you do to one side you have to do to the other.
P.S. you proved my point
The only people who think there’s something wrong with PEMDAS are people who have forgotten one or more rules of Maths.
https://www.youtube.com/watch?v=lLCDca6dYpA
…oh wait I remember that
Well, you seem to have forgotten that the woman in that video isn’t a Maths teacher, which would explain why she’s forgotten the rules of The Distributive Law and Terms.
until you gave up
I didn’t give up, you did.
I suggest we don’t do it again but instead, you review the thread
I suggest you check some Maths textbooks, instead of listening to a Physics major.
those systems are giving an incorrect answer
When there’s an incorrect answer it’s because the user has made a mistake.
Instead of telling those people they’re wrong
They were wrong, and I told them where they went wrong (did something to one side of the equation and not the other).
Maths teachers are constantly wrong about everything
Very rarely wrong actually.
the abomination that is PEMDAS
The only people who think there’s something wrong with PEMDAS are people who have forgotten one or more rules of Maths.
you can prove it with math
Not a proof, just wrong. In the “(substitute 0.9999… = x)” step, it was only done to one side, not both (the left side would’ve become 9.99999), therefore wrong.
It’s like going to a mathematics forum and declaring “Guyz I forgot to carry a 1, screw Maths.
You may think you’re joking, but as a Maths teacher I can tell you I have seen a lot of posts where someone makes a mistake with their signs, then uses their wrong answer to declare “The rules of Maths are wrong! Look - different answer!”. Yeah umm, try working on getting your arithmetic right first before claiming to have “proved” something. 😂
Personally, I dislike the way the UI is declared and bound though (XAML)
You can write the MAUI UI in C#. No need to use XAML anywhere.
I’ve never used 8, but I liked 10. I especially liked the built-in anti-virus - there was noticeable performance improvement once I got rid of the 3rd party stuff. Absolutely hate 11 though - I’m planning on rolling back soon.
Yeah, the last time I posted about AI stuff I got my first-ever negative net votes here, but it was news and I posted it. Same here. Alvin Ashcraft also posted a link to it, and I said to him that from what I’ve seen so far, this isn’t going to work out any better for them than it did last time. Maybe next time they might learn to ask developers first, BEFORE saying “Hey developers - we need you!”.
The rules and the acronyms describe different things.
No, they don’t.
If you have to make more rules to say M and D are the same,
I didn’t make more rules - that’s the existing rules. Here’s one of many graphics on the topic which are easy to find on the internet…
…that’s one of the two examples you used?
Yes. Did you try looking for one and ramping it up to the most difficult level? I’m guessing not.
IT IS AMBIGUOUS IN THIS POST
No, it isn’t. Division before subtraction, always.
ALL EXAMPLES I HAVE SHOWN
None of those have been ambiguous either, as I have pointed out.
That is the problem at hand.
The problem is people not obeying the rules of Maths.
There is no real problem solving in trying to decipher poorly written shit
It’s not poorly written. It’s written the exact way you’d find it in any Maths textbook.
You are adding more rules
I’m stating the existing rules.
If all that matters is higher orders first
I don’t even know what you mean by that. We have the acronyms as a reminder of the rules, as I already said.
I know operators apply to the numbers to their right.
If you know that then how did you get 2-2+2=-2?
With 2/22, you don’t know if it is 22/2, or 2/(2*2)
Yes you do - left associativity. i.e. there’s no brackets.
When you are dividing by numbers, you put them all in the denominator
Only the first term following a division goes in the denominator - left associativity.
BY CONVENTION, as I said. You don’t have to repeat what I said a second time.
I didn’t. You said it was a convention, and I corrected you that it’s a rule.
It’s not like you could have tried in your head different orders to combine 3 numbers.
addition first
2-2+2=4-2=2
subtraction first
2-2+2=-2+2+2=-2+4=2
left to right
2-2+2=0+2=2
3 different orders, all the same answer
Who’s on first? :-)
Still not quite sure what the different design ideas behind Xamarin and Maui is
Xamarin had separate projects for each platform, whereas they’re all together in MAUI. Also Xamarin was tied to .NET Standard 2.1, whereas MAUI uses the latest .NET releases (starting with 5 or 6 - I’m now on 8). MAUI major releases now come out at the same time as Visual Studio updates. Also, as mentioned, MAUI uses handlers, but I’m still trying to work out how you actually use one to create a property (sigh). There was a few, annoying, breaking changes too. e.g. in Xamarin I could define the span and height of an element in a Grid with a single command, but now I have to use two (for some bizarre reason setting the column span is now entirely separate. I ended up writing my own function so I could do it all in 1 line again).
I had someone say that to me, a Maths teacher, when I was trying to tell them where they were going wrong with their Maths! 😂And they were a programmer - no wonder all the e-calcs are wrong… (sigh)
Multiplication comes before division in some forms, like PEMDAS. In the example I use, this changes the answer
If you have both multiplication and division then you do them left to right. PEMDAS doesn’t mean multiplication first, nor does BEDMAS mean division first. It’s PE(MD)(AS) and BE(DM)(AS) where the bracketed parts are done left to right.
you should specify what it is operating on
Left associativity means it always operates on the following term. i.e. terms are associated with the sign on their left.
The minus sign only applies to the middle term, by convention
By the rule of left associativity.
But if you use one of these acronyms, you end with this expression evaluating to -2
No it doesn’t. How on Earth did you manage to get -2?
all these acronyms end up being useless waste of time
No they’re not, but I don’t know yet where you’re going wrong with them without seeing your working out.
Even your “BODMAS” isn’t universal, lots of people learn “PEMDAS” or “BEDMAS”
The rules are universal, only the mnemonics used to remember the rules are different
except for facebook and twitter
… and high school Maths textbooks, and order of operations worksheet generators, and…
2/2*2 It is 0.5 or 2 depending on order.
It’s always 2. #MathsIsNeverAmbiguous
What do you mean not taught yet? There’s nothing in the meme to indicate this is a primary school problem. In fact it explicitly has a picture of an adult, so high school Maths is absolutely on the table.
In high school we teach that they are the same thing. i.e. limits of accuracy, 1 isn’t the same thing as 1.000…, but rather 1+/- some limit of accuracy (usually 1/2). Of course in programming it matters if you’re talking about an integer 1 or a floating point 1.
The only people I’ve seen get things wrong is people not using the systems correctly (such as the alleged “proof” in this thread, which broke several rules of Maths and as such didn’t prove anything), and it’s a teacher’s job to point out how to use them correctly.