Maybe try to select just one article that you personally find most interesting, and post it instead?
The Daily .NET News is 1 post a day. Picking one article from it is still 1 post a day. It's all interesting. That's why I get more upvotes than downvotes for them. I stop posting things that get more downvotes than upvotes (such as AI stuff), always have. One person decided to complain about them instead of just downvoting.
You teach how to solve equations, but not the fundamentals
Nope. We teach the fundamentals. Adults not remembering them doesn't mean they weren't taught. Just pick up a Maths textbook. It's all in there. Always has been.
Fundamentals, most of the time, are taught in universities
No they're not. They only teach order of operations from a remedial point of view. Most of them forget about The Distributive Law. I've seen multiple Professors be told by their students that they were wrong.
it’s not really math in a sense that you don’t understand the underlying principles
The Constructivist learners have no trouble at all understanding it.
Nope.
Yep!
There’s only commutation, association, distribution, and identity.
And many proofs of other rules, which you've decided to omit mentioning.
It doesn’t matter in which order you apply any of those properties, the result will stay correct
But the order you apply the operations does matter, hence the proven rules to be followed.
2×2×(2-2)/2
Notably you picked an example that has no addition, subtraction, or distribution in it. That's called cherry-picking.
Completely different order, yet still correct
Yep, because you cherry-picked a simple example where it doesn't matter. It's never going to matter when you only pick operations which have the same precedence.
My response to the rest goes back to the aforementioned
...cherry-picking.
No, I am saying you are wrong
And textbooks, calculators, accountants, and @sxan@midwest.social, who also explicitly pointed out that what you did was 10-(1+1). I see you didn't read the textbook either then.
No one else
Nope, also all the other parties listed above, who all agree with me
The saddest, and funniest, part is that you are so egotistical that you don’t see why you are wrong
That would be you again, after it has been explained to you many times, by me, other commentators, and Maths textbooks.
Maybe you will get it one day, but I won’t be there for it
Again that applies to you only, the only one here who thinks 10-1+1=8 when doing addition first, even though 11-1=10.
Self reflection is good.
How do you know when you haven't tried it yet? If you had, you would realise you also owe @cabron_offsets@lemmy.world an apology too
I know it is wrong, which is why I am telling you what my mistake was originally
But failing to understand what your actual mistake was, coming up with -1+1=-2, and not -1+1=-0
The fact that you still don’t get it demonstrates your complete lack of understanding
That would be you, the one who thinks order matters, and that -1+1=-2, not -0.
Order does matter
Nope!
+10-1+1=10
+10+1-1=10
-1+10+1=10
+1+10-1=10
+1-1+10=10
-1+1+10=10
Put those all into a calculator, and/or ask an accountant about it.
that order is left to right.
And yet, going RIGHT TO LEFT +1-1+10=0+10=10, same answer... though I have no doubt you think it's +1-1+10=+1-11=-10
The original equation is written correctly
and 10-(1+1) isn't, hence your continued wrong answer
My mistake was doing the addition before the subtraction when the equation reads 10 - 1 + 1
No, your mistake was doing 10-(1+1) where the question reads 10-1+1, and not +10+1-1 <== this is addition first, you add all the positive numbers together first, then do the negative numbers This is literally the textbook way to do it
According to you 6a²b-11a²b+5a²b-7a²b+2a²b=6a²b-16a²b-9a²b=-19a²b, and yet the textbook quite clearly states it's -5a²b, which is because it's 6a²b+5a²b+2a²b-11a²b-7a²b=13a²b-18a²b, and NOT 6a²b-(11a²b+5a²b)-(7a²b+2a²b)
10-(1+1)=10-1-1 which is what you did, which is not 10-1+1. You "added" 1 to -1, and got -2 instead of 0
How are you still not getting this?
It's not me who's not getting it.
No it wasn’t.
Yes it was. Read the textbooks.
The original equation is written correctly but the logic is incorrect
No your logic is incorrect. You're incorrectly adding brackets to it.
in order to make it work the way I declared you have to do the equation x - y + z doing the y + z first
By putting it in brackets which is not how addition is done first. Doing addition first for x - y + z is x + z - y, not x - (y + z)
which was the mistake doing addition then subtraction
No, the mistake was you put the addition in brackets, -(1+1)=-2, not -1+1=+1-1=0. As per the textbook, the sum of any 2 numbers can only have 1 value. That 1 value for -1 and +1 is 0. -1+1=0, +1-1=0, not -1+1=-2
doing addition then subtraction instead of addition and subtraction in order from left to right
The rules are you either do addition then subtraction, OR you do left to right. There is no such thing as addition then subtraction left to right.
Addition then subtraction 10+1-1=11-1=10
Left to right 10-1+1=9+1=10
What you did 10-(1+1)=10-2=8
I see you are still being a bad teacher
says bad student, who didn't try what the teacher said to try
who refuses to listen
that would be you again. You didn't try it on a calculator, you didn't ask an accountant. You didn't even read and understand my examples. Read the textbook - it's not just me telling you this.
I am not continuing with you
Because you're unwilling to admit you're wrong and refuse to try what the teacher and textbook have told you to do, and also refuse to ask an accountant about it
The fact that you still don’t get it demonstrates bad faith
Nope, that's you again. You're even arguing with literal textbook examples.
willful ignorance, and an unwarranted superiority complex
Also you, thinking you're above Maths teachers, calculators, accountants, and Maths textbooks. According to you all of us are wrong, and only you are right. Get a grip
Yes, a video, by Gerald of the MAUI team.
Looks like you're on mobile, so not sure if it works the same, but on PC these are the 2 places you can click and it takes you straight into the video (works for me)
Welcome to the 21st century
Welcome to it's not a textbook (and it wasn't about order of operations anyway).
We have this thing called the internet so people can share information without killing trees
We also have this thing called textbooks, that schools order so that Maths classes don't have to be held in computer labs.
It’s the resource material for a college course
And the college doesn't teach order of operations.
That’s like the definition of a text book
by someone who can't back up their statements with actual textbooks.
One is a PhD teaching a college course on the subject
Yep, exactly what I said - a random person as far as order of operations is concerned, since he teaches Set Theory and not order of operations.
the other is Wolfram
Yeah, their programmers didn't know The Distributive Law either.
I’m willing to bet their credentials beat “claims to be a high school math teacher” pretty soundly
Happy to take that bet. Guarantee you neither of them has studied order of operations since they were in high school.
This portion of the discussion wasn’t about order of operations
Yes it is. I said that order of operations dictates that you have to solve binary operators before unary operators, then you started trying to argue about unary operators.
it was about the number of inputs an operator (+, and - in this case) has
Yep, the ones with more inputs, binary operators, have to be solved first.
Try to keep up
Says person who's forgotten why we were talking about it to begin with! 😂
At least your repeated use of the plural maths means you’re not anywhere near my kids.
Well that outs yourself as living in a country which has fallen behind the rest of the world in Maths, where high school teachers don't even have to have Maths qualifications to teach Maths.
when those symbols are being used as a “sign of the quality” of the number it’s referring to
which is always. As usual, the comprehension issue is at your end.
not when it’s being used to indicate an operation like addition or subtraction
Yes it is 😂
Hopefully that clears it up
That you still have comprehension issues? I knew that already
This is ignoring the fact that a random screen shot could be anything
The name of the book is in the top left. Not very observant either.
For all I know you wrote that yourself
You don't care how much you embarrass yourself do you, given the name of the book is in the top left and anyone can find and download it. 😂
because the first “+” isn’t an operator
Yes it is! 😂
It’s, as your own picture says, a sign of the quality of 2
and a sign of the quality of the 3 too. There are 2 of them, one for each Term, since it's a 1:1 relationship.
I would love to know how you get to a sum or difference with only one input.
You don't. Both need 2 Terms with signs. In this case +2 and +3.
2 is the first, and 3 is the second
Yep, corresponding to the 2 plus signs, +2 and +3. 1 unary operator, 1 Term, 2 of each.
Two inputs for addition
2 jumps on the number line, starting from 0, +2, then +3, ends up at +5 on the number line. This is how it's taught in elementary school.
Did you get it this time?
The real question is did you?
Was that too fast?
No, you just forgot one of the plus signs in your counting, the one we usually omit by convention if at the start of the expression (whereas we never omit a minus sign if it's at the start of the expression).
You can go back and read it again if you need to
I'm not the one who doesn't know how unary operators work. Try it again, this time not leaving out the first plus sign.
Fine, operation then
Nope, not an operation either.
The fact that you think “!” is the same thing as brackets
I see you don't know how grouping symbols work either.
Maybe you’re just being weirdly pedantic about operator vs operation
Grouping symbols are neither.
Which would be a strange hill to die on since the original topic was operations
You were the one who incorrectly brought grouping symbols into it, not me.
I could keep providing sources
You haven't provided any yet! 😂
I still don’t have the time to screen shot some random crap with no supporting evidence
Glad you finally admitted you have no supporting evidence. Bye then! 😂
10-1+1=10 only if you don’t the addition first 1 + 1 = 2 - 10 = 8
Nope, yet again you just did 10-(1+1), which is wrong for 10+1-1. It gives 10 in any order. 10+1-1=11-1=10 <== did addition first, got 10. Accountants would have a nightmare if order mattered. "Did we receive this payment first, or this invoice? The order matters! ARGH!"
which was my mistake, which I already stated.
No, your mistake was adding brackets, 10-(1+1) ISN'T how to do addition first. 10+1-1 is. Ask an accountant! 😂 As you discovered 10-(1+1)=10-1-1, which isn't 10+1-1, nor 10-1+1. 10-1-1=8, which is what you did - 10-1-1=10-(1+1) - 10-1+1=10, 10+1-1=10.
I see you still didn't try it on a calculator yet then
Enjoy the egg on your face bud
None on my face. My students do very well in their tests. How about you? BTW try it on a calculator and guess what answer you'll get. hint: it'll be the same answer regardless of which order you do it 😂
To save you some trouble, here's the results from my calculator...
10+1-1=10
10-1+1=10
-1+10+1=10
+1+10-1=10
-1+1+10=10
1-1+10=10
It is though. Here’s a link to buy a printed copy:
BWAHAHAHAHAHAHA! They print it out when someone places an order! 😂
You keep mentioning textbooks but haven’t actually shown any that support you. I have
No you haven't. You've shown 2 websites, both updated by random people.
I’ll trust the PhD teaching a university course on the subject
I already pointed out to you that they DON'T teach order of operations at University. It's taught in high school. Dude on page you referred to was teaching Set theory, not order of operations.
over the nobody on the internet
Don't know who you're referring to. I'm a high school Maths teacher, hence the dozens of textbooks on the topic.
Talking about yourself in the third person is weird
Proves I'm not weird then doesn't it.
Even your nonsense about a silent “+”
You call what's in textbooks nonsense? That explains a lot! 😂
is really just leaving off the leading 0 in the equation 0+2
And yet the textbook says nothing of the kind. If I had 2+3, which is really +2+3 (see above textbook), do I, according to you, have to write 0+2+0+3? Enquiring minds want to know. And do I have to put another plus in front of the zero, as per the textbook, +0+2+0+3
Because addition is a binary operator
No it isn't 😂
Only the ones that operate on two inputs.
Now you're getting it. Multiply and divide take 2 inputs, add and subtract take 1.
Some examples of unary operators are factorial, absolute value, and trig functions.
Actually none of those are operators. The first 2 are grouping symbols (like brackets, exponents, and vinculums), the last is a function (it was right there in the name). The only unary operators are plus and minus.
I can’t keep trying to explain the same thing to you
You very nearly got it that time though! 😂
at least less wrong
Again, it's not me who's wrong.
I feel bad for your students if you cannot see why you are wrong here
My students know I'm right. Everyone's students know that's right. It's only adults who've forgotten the rules who get this wrong.
If you had a bad teacher that doesn't mean everyone else had a bad teacher.
We teach them how to do proofs, including several specific ones.
We teach them how to use everything, and how to do proofs as well. Your whole argument is just one big strawman.
Happens to be the topic of the post.
Yes it is! 😂
So you could not do the brackets first and still get the right answer? Nope!
2×2×(2-2)/2=0
2×2×2-2/2=7
Not random at all, given you were talking about students understanding how Maths works.
Yes it is! 😂 If I have 1 2-litre bottle of milk, and 4 3-litre bottles of milk, there's only 1 correct answer for how many litres of milk of have, and it ain't 20! 😂 Even elementary school kids know how to work it out just by counting up.
No they don't. The proof of order of operations has got nothing to do with any of the properties you mentioned.
And neither is used to prove the order of operations.
Again with a cherry-picked example that only includes operators of the same precedence.
And yet we have a proof of why 14 is the only correct answer to 2+3x4, why you have to do the multiplication first.
Of course it is. So what?
No it didn't. It had Brackets (with subtraction inside) and Multiplication and Division.
Yep, and I just pointed out that what you just said is wrong. 2-2(1+2) has Subtraction and Distribution.
Which was done first because you had it inside Brackets, therefore not done in the Subtraction step in order of operations, but the Brackets step.
You already know - you know which operations to pick to make it look like there's no such thing as order of operations. If I tell you to look up at the sky at midnight and say "look - there's no such thing as the sun", that doesn't mean there's no such thing as the sun.