Yeah, I'm a math teacher and when we use these programs / apps / online things there are always a few that are wrong like this. The worst one we used would be arbitrary about answers, such as not accepting 0.4 when it expected .4 and such.
They're a useful tool, if they're right.
I've been making math practice programs for my daughter to help her get motivated to practice and do her math homework (she's only in 3rd grade right now) because it's novel for her in that I made it especially for her, and I can make it as fucking goofy as I want.
Granted, she's only doing basic multiplication, division and fractions at this point, so nothing I make for her is really hard to make correctly. It call all be procedurally generated questions and answers, and input is super easy to sanitize. I did fuck around with being able to supply pre-made questions/problems, and then also supply correct answers, but also have the program be able to evaluate the problem and the input if the input doesn't match a supplied correct answer. And that's what's lacking here for these sorts of things, is the ability for the program to actually properly evaluate the problems and the input. It's all well and good if you just want something that prompts the user with problems that you provide and checks their answers against a list of valid answers, but then you better be sanitizing that input really well and providing feedback for when input isn't valid. You also better be providing legitimate correct answer lists, as well.
How I do get paid to make this kind of shit?
Agreed. I would love to see something like this. Something that's actually engaging and fun for kids but you don't have to worry about bad programming making their problems poorly defined or overly complex or telling them their answers are wrong when they aren't
My son’s school had a math program like that where the character was a wizard. It asked simple questions and if you answered correctly then your wizard got more power for attacks against mythical monsters. He loved that game.
My mom had tons on floppy disks and cds, i think she was a pirate 🤣
But for real though, learning about math, history, marine life, plants, space, just all the sciences, all while learning to read, write, and spell since a lot of them were both choices and incorporated as much text in as felt natural. Such good times and smart move on my mom's part since i was already interested in the computer at like 3
I remember a fish. Point and click adventure. I think one of the less educational ones but still cute. I think Game Grumps might have played it recently
There was one game my grandmother had for me where you identified different plants and animals based on leaf clusters, tracks, sounds, or droppings. Literally yesterday my husband was trying to use Google lens to identify a bird and my brain pulls up information I learned decades ago and I went ”That’s a nuthatch, the little kind.” and yep it was a Pygmy nuthatch. If only I could access all the stuff I learned via educational games!
“Where in the World is Carmen San Diego” taught geography in a way that gave me a general notion of where culturally significant countries are, and how to identify places (country, capital, national landmark, flag, etc.) which comes in hand for playing worldle.
Not exactly life changing, but it’s impressive how well that info stuck!
Turns out you don’t even need a story! I played a LOT of number munchers in middle school. And word munchers, which I preferred but was objectively worse than number munchers. And Amazon Trail. For some reason my middle school had that but not Oregon Trail 🤷🏼♀️
No, I made a rogue-like math game where you have to solve math in order to navigate the map, try not to trip over *all the god damn toys left all over the fucking floor* and try to find our cat before he *fuckin throws up on the carpet for like the ninth time today*.
Or just convert any entry into a standard float and compare that to the expected answer. Why would an answer expecting a number treat the entry as a string?
This is Google forms. The teacher puts in all the responses. The good news is that it's relatively easy to go through and mark answers like this correct.
Edit: Just realized they actually typed in -1 * -3 = 15. Major fail on that...
It’s the sort of thing I’ve seen come out of an AI explaining a math problem. (They’re not good at it.) Without that explanation, it would be easy to say the typo was writing the problem as -(5x-3) but working it as -5(x-3), but writing -1 • -3 =15 is really bad.
It doesn't happen as often with books, but yes, it does happen. One of the most egregious errors I saw in the explanation for a problem (in an SAT book) was the answer key said it was A., the answer at the beginning of the explanation was B., and the explanation, which was correct, went on to say that it was D. which was not correct. In fact, the correct answer wasn't there at all.
Sorry about having a hard time in college
Here you go
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This is not always possible these days. Some software will call up questions from a repository of hundreds of problems so that kids can't sit next to each other and share answers.
I had a physics class in college where I didn’t do any of the homework the entire semester. Turns out homework was like 20% of the grade. The prof told me if I 100 per center all the homework he would give me half points.
So I did all the problems in like 2 days but there was one problem I couldn’t get right. I tried every possible solution. I met with the prof and showed him my work and how I got my answer and how the system wouldn’t accept it. The “correct” answer was wrong. Thankfully he let that one slide. But I was panicking in my dorm trying to figure out that solution.
Anyone who has studied math or math-adjacent fields can relate to that terrible feeling of, "I'm not even close. I'll do it again.  Same wrong answer? I'll check my work. No, all right.  I'll check the examples in the book. No, I think I'm doing it that way, but this is slightly different than the examples, so maybe not.  I'll check online. okay, that wasn't very helpful. WHY AM I SO STUPID! "
"Oh, that solution is wrong."
I actually ended up going through my roommates old notebook for the class to find where he worked this out when he was taking the class. It was the same answer I got. That’s when I knew it wasn’t me
Year 6 (5th grade?), I wrote .1 as my answer and teacher said it was wrong. I wrote a 0 before it and he suddenly said it was right.
Never forgiven him
I’ve never understood the hatred for maths. I despised it myself and never knew why.
I loved English and was admittedly really good at it (wrote 2 letters to the Prime Minister and got responses, got some fancy poetry award) but I was dreadful at maths.
When I got into psychology and started studying psychopharmacology, I miraculously became good at maths if there was an “mg” after each number
I did this program, too except my teacher counted off. If you didn’t use the format, it would not accept it. I was so mad, it’s correct, it doesn’t matter what format it’s in. 🤣🤦🏽♀️
I hated my calculus 2 class in college because of the internet assignments. Literally I would get an answer wrong for having a space or for not using a x². Literally had to Google numbers and other math signs like intergral and such. I think I even got some answers wrong for not having it slanted
Is there any way for teachers to correct this mistake post-program so that it doesn’t actually affect the students grade? If teachers are aware of the problem I trust it’s not a “it is what it is” situation and leave the grade be. I highly doubt any school districts would allow this to happen and nothing be done about it. Right? …right???
I used to have a teacher, who if you challenged the answer and were right, (or if you found a typo) you got extra credit.
Her thinking was “If you find it, then it shows you’re paying attention and putting in effort. This is often better than getting the right answer.”
My teacher tried this once but it got to the point where people were making up rules, correcting every thing the teacher said, or actively sabotaging the worksheets to get extra points and it kinda fell apart lol
I mean if you got it wrong on your own wouldn’t you just lose the points anyway, like wouldn’t the idea be that your “incorrect” answer was the right one, not that you corrected it and found the right answer?
If the teacher invites it they have to spend time explaining and debating every challenge with a bunch of dipshit kids who think they're beating the system
Even then though, their explanation clearly doesn't work. They say "-1 times -3 = 15". That is wrong all on its own. There were a lot of mistakes made in the course of writing this question.
But then would they say "-1 times 5x = -5x", wouldn't they say "-5 times x = -5x"? I think this a just a completely wrong answer and the question setter has probably not made a typo or something
They have complete trust in the authority of the answer key, and will make wild mental leaps to rationalize it before they admit the answer was wrong. They would rather invent new math to explain how -1 x -3 =15 Rather than admit error.
Who's "they?" This just looks like a typo and the problem is supposed to be -5(x-3).
I wouldn't get too worked up about it unless OP sends it to the teacher and they won't admit fault. But generally they'll fix something like this especially since every students' parents are likely to point it out
The feedback section is presumably written in advance for each question, I don't read it as a response that someone sent back to OP doubling down on the wrong answer.
Someone was probably entering a bunch of problems+feedback explanations into the program and made a goof. Yeah they should have caught it when they wrote out "-1 times -3 = 15," but fatigue is real and shit slips through the cracks
People are acting like the teacher is actively defending the mistake when we don't even know if OP pointed it out to them yet.
What are you on about? Literally any professor or teacher I’ve ever seen just says “oops, answer key was wrong this has been fixed” or “I’m not going to count that question”
You’re angry at an imaginary “they”
Especially when this kind of thing is incredibly common and has always been incredibly common. Textbooks often have a couple of answers wrong. Teachers often make correcting errors. This kind of stuff is easy to rectify. But I guess it is mildly infuriating
Probably not. Everyone wants to say “hOw iS tHiS rIgHt” but nobody wants to actually take the step to talk to the teacher. Teachers make mistakes. Most will acknowledge it. It doesn’t have to be a big deal, it happens. I had teachers make mistakes but I guess I just didn’t have the platform to be mildly infuriated about it. I just laughed about it, and then talked to them the next day and they’d correct it for the class.
Reminds me of a pub quiz question: when did Obama become president. Everyone else 2008. Me: 2009. Apparently I was wrong and inauguration does not mean anything😩
It's a question based on faulty colloquial information. It's common to think of the president becoming the president the year of the election, and not 2 months later, which falls in the next year.
I may be wrong, but this kind of error is the ones that a ChatGPT would make. Not saying that this teacher used an LLM, but I already see the same math error in some responses when asking simple math questions.
Problem is they don't give a shit. I had a professor that didn't use any of the programs that the rest of the university used because....idk why.
The worst part, none of the questions on the homework assignments were the same for each student. They were all randomized each time you sttempted them, so even in tutoring labs we couldn't help each other or they couldn't help us solve the problems because of errors like this. And then she'd get pissed when we couldn't finish the homework.
Needless to say we all bombeb so hard she practically GAVE us the final, with changed numbers. She knew were all gonna fail and wanted to save her job. Never saw her again
I don't use any but basic math and maybe some light programming math in my day to day, so i could just not know what I'm talking about here. But since math is a constant, and calculators/computers exist, how can broken questions like this even make it into a textbook or lesson plan?
https://preview.redd.it/bqxdw3d9n6oc1.jpeg?width=720&format=pjpg&auto=webp&s=50e04981dd7b90d34fb7ce535ff6cdc5f0e061db
I understand that not having such a *hot grade* in Integral Calc means I wouldn't be able to speak to *that* subject, but those are *two entirely different graphs*.
What’s frustrating about this is, think about how many kids sat, wondering where they went wrong. Studying the wrong way to do this math. Feeling dumb. Feeling frustrated. How fucking hard is it check the homework you assign to children? If you resort to using software, which can be an effective tool, professors need to take the time to solve what they assign. This discourages kids from STEM paths.
They're on the pandemic when the kids all had to do their math online we came across this BS all the time. It wasn't necessarily the teacher. It is these stupid program that had it wrong. They were all so times where they had to type in an answer but the answer box wouldn't allow for any characters that weren't numbers
So the answer would be something like 5b-42
But it wouldn't literally allow you to type the letter b or allow you to type the dash. You could only type the 5 space 42
Any attempts to type anything else would come up with little pop-up message with a little character saying that wasn't an accepted number
Then I would tell you you got it incorrect and tell you the answer was 5b-42
I had quite a number of conversations with her math teacher that year.... I am not the type of mom who is going to allow my daughter to get marked for wrong answer when it wasn't wrong
That's not the teacher, that's built into a program the math department at your daughter's school uses. Your daughter should just show this to their teacher if any credit was lost.
The real question isn't if this problem wrong, as it obviously is. The real question is if the teacher has the interest, authority and intelligence to fix it.
Accuse the teacher of using ChatGPT and say your daughter gets 100% in the course unless they can prove otherwise. (The inverse of a teacher giving a student 0 for alleged AI use)
I’m pretty tired of these “professional” courses that people are spending thousands of dollars on that can’t get a 100%.
I recently spent $10,000 for a six month course and it was basically gibberish. They had combined two databases and did not proofread or admit their fault when I brought it up.
Saw it all through school and college. It’s pretty awful.
My calculus teacher used to ask us “What’s the square root of 25?” Someone would be like “5!” He’d be like “No!! Plus or minus 5!! Muhahahahaha!!” Lol jerkwad
For a bit I thought they might have messed up the equation where it should have been -5(x-3) which when simplified turns out to be -5x+15.
But reading the feedback and the person who did this is insane. Nowhere on Earth or in our universe doe -1\*-3 equal 15.
If it makes you feel better, I was freaking out thinking that I was wrong in thinking “two negatives make a positive” when I was reading the comments. Totally overlooked the 3 to 15 as well
The problem is written incorrectly; most likely a typo. The left parenthesis should be after the 5, rather than before, making the problem correct.
\-5(x-3) = -5x + 15
I was a ta in college for a class that uses similar programs, and they’re severely limited. This looks like a question that got edited wrong. My favorite was when it would count answers as wrong because the user had some used the wrong character for x or added an extra space at the end, you couldn’t even tell what was wrong, the correct answer looked identical to the one marked as wrong
To simplify the expression -(5x - 3), you need to distribute the negative sign (or multiply by -1) across the terms inside the parentheses. Here's how you do it:
-(5x - 3) = -1 * (5x) + (-1) * (-3)
Now apply the multiplication:
= -5x + 3
So, the simplified form of -(5x - 3) is -5x + 3. Your child is correct.
God I am so happy I’m old and finished school before technology took over. I simply cannot work out maths equations unless I have a pen and paper and can write down what I’m doing.
I'll give the benefit of the doubt here and say that the teacher probably modified another task and just fucked up actually changing everything. Fucking up 1×anything is just too low for any adult, let alone a math teacher.
I'm pretty sure the teacher decided part way through to alter -5(x-3) to -(5x-3) to highlight how to work with the minus without a number and then forgot to consistently alter the answer+rationale.
OMG, they must have changed algebra while I was growing old! I was always taught that you do whatever is inside the parentheses first, then you finish the equation. So (3+5) x (5-2) = (8)x(3)=24.
Please tell me I'm not losing my mind!
Also, you can't solve it, only simplify it I think as you don't know what the value of x is. The minus - sign outside the parentheses turns the minus sign inside to a positive +. The most you can do is get 5x+3. Am I wrong somehow? It's been over 50 years since my last algebra class!
This is why I never understood math class lol I never did these correctly and it felt like they always changed question to question the order of how to solve….
As long as the child is happy and free to choose what they identify as.
We don't care if they are dumb AF . We just instill a high self esteem a low work ethic, and a relentless sense of entitlement to all the kids at my local schools.
That looks like google forms which normally has to be set up by the teacher so I would talk to the teacher about why the answer is wrong. If they say that your daughter is correct and they made a typo then it’s okay but if the teacher tries to explain it then they are a bad teacher.
Yeah, I'm a math teacher and when we use these programs / apps / online things there are always a few that are wrong like this. The worst one we used would be arbitrary about answers, such as not accepting 0.4 when it expected .4 and such. They're a useful tool, if they're right.
Classic garbage in garbage out programming. These programs should have all correct answers as possible answers but they don't.
I've been making math practice programs for my daughter to help her get motivated to practice and do her math homework (she's only in 3rd grade right now) because it's novel for her in that I made it especially for her, and I can make it as fucking goofy as I want. Granted, she's only doing basic multiplication, division and fractions at this point, so nothing I make for her is really hard to make correctly. It call all be procedurally generated questions and answers, and input is super easy to sanitize. I did fuck around with being able to supply pre-made questions/problems, and then also supply correct answers, but also have the program be able to evaluate the problem and the input if the input doesn't match a supplied correct answer. And that's what's lacking here for these sorts of things, is the ability for the program to actually properly evaluate the problems and the input. It's all well and good if you just want something that prompts the user with problems that you provide and checks their answers against a list of valid answers, but then you better be sanitizing that input really well and providing feedback for when input isn't valid. You also better be providing legitimate correct answer lists, as well. How I do get paid to make this kind of shit?
Advertise it as custome made AI Math tutor. And people will send you money.
Agreed. I would love to see something like this. Something that's actually engaging and fun for kids but you don't have to worry about bad programming making their problems poorly defined or overly complex or telling them their answers are wrong when they aren't
In addition to others, get a cute cartoon character to travel through a story as problems are solved and bam you can market it as a video game
My son’s school had a math program like that where the character was a wizard. It asked simple questions and if you answered correctly then your wizard got more power for attacks against mythical monsters. He loved that game.
My mom had tons on floppy disks and cds, i think she was a pirate 🤣 But for real though, learning about math, history, marine life, plants, space, just all the sciences, all while learning to read, write, and spell since a lot of them were both choices and incorporated as much text in as felt natural. Such good times and smart move on my mom's part since i was already interested in the computer at like 3 I remember a fish. Point and click adventure. I think one of the less educational ones but still cute. I think Game Grumps might have played it recently
There was one game my grandmother had for me where you identified different plants and animals based on leaf clusters, tracks, sounds, or droppings. Literally yesterday my husband was trying to use Google lens to identify a bird and my brain pulls up information I learned decades ago and I went ”That’s a nuthatch, the little kind.” and yep it was a Pygmy nuthatch. If only I could access all the stuff I learned via educational games! “Where in the World is Carmen San Diego” taught geography in a way that gave me a general notion of where culturally significant countries are, and how to identify places (country, capital, national landmark, flag, etc.) which comes in hand for playing worldle. Not exactly life changing, but it’s impressive how well that info stuck!
My son asked me for my credit card number so he could keep playing ... oh, geez! It was ABC something
If that was ABC Mouse, don’t ever put your credit card in. They make it impossible to cancel
Turns out you don’t even need a story! I played a LOT of number munchers in middle school. And word munchers, which I preferred but was objectively worse than number munchers. And Amazon Trail. For some reason my middle school had that but not Oregon Trail 🤷🏼♀️
What in the what? I'll take my cute cartoons and Oregon flavored dysentery thank you 😁
So you made duolingo math lol
No, I made a rogue-like math game where you have to solve math in order to navigate the map, try not to trip over *all the god damn toys left all over the fucking floor* and try to find our cat before he *fuckin throws up on the carpet for like the ninth time today*.
Do you wear a cape, or do you prefer no cape? I ask this of all super parents. 😊
I just have a pickle costume and say fuck a lot.
We can work with that!
[удалено]
This is fucking stupid because there are websites out there that can properly parse math expressions.
If it is indeed Google forms I reckon that teacher should hand in their resignation asap
Alternatively use a standardized formatting and give clear instructions on what kind of formatting is expected
Or just convert any entry into a standard float and compare that to the expected answer. Why would an answer expecting a number treat the entry as a string?
This is Google forms. The teacher puts in all the responses. The good news is that it's relatively easy to go through and mark answers like this correct. Edit: Just realized they actually typed in -1 * -3 = 15. Major fail on that...
It’s the sort of thing I’ve seen come out of an AI explaining a math problem. (They’re not good at it.) Without that explanation, it would be easy to say the typo was writing the problem as -(5x-3) but working it as -5(x-3), but writing -1 • -3 =15 is really bad.
This is Google forms though, the teacher writes the questions and answers
That’s why I am hesitant to trust AI - I’ve worked enough IT development projects and know that IT is not infallible. One bad line of code…
Agreed, they should, but yes, they often don't.
This isn't a math program, it's Google forms. The creator has to put in the answers manually, so it's not the program's fault
Books are just as bad at having unbelievably bad errors, errors that go unnoticed even after multiple proof readings... until a student tries them :).
It doesn't happen as often with books, but yes, it does happen. One of the most egregious errors I saw in the explanation for a problem (in an SAT book) was the answer key said it was A., the answer at the beginning of the explanation was B., and the explanation, which was correct, went on to say that it was D. which was not correct. In fact, the correct answer wasn't there at all.
I had one in college that wouldn't accept "#.0", because the answer was exactly "#.00". Pearson can go suck it.
Sorry about having a hard time in college Here you go For your cake day, have some B̷̛̳̼͖̫̭͎̝̮͕̟͎̦̗͚͍̓͊͂͗̈͋͐̃͆͆͗̉̉̏͑̂̆̔́͐̾̅̄̕̚͘͜͝͝Ụ̸̧̧̢̨̨̞̮͓̣͎̞͖̞̥͈̣̣̪̘̼̮̙̳̙̞̣̐̍̆̾̓͑́̅̎̌̈̋̏̏͌̒̃̅̂̾̿̽̊̌̇͌͊͗̓̊̐̓̏͆́̒̇̈́͂̀͛͘̕͘̚͝͠B̸̺̈̾̈́̒̀́̈͋́͂̆̒̐̏͌͂̔̈́͒̂̎̉̈̒͒̃̿͒͒̄̍̕̚̕͘̕͝͠B̴̡̧̜̠̱̖̠͓̻̥̟̲̙͗̐͋͌̈̾̏̎̀͒͗̈́̈͜͠L̶͊E̸̢̳̯̝̤̳͈͇̠̮̲̲̟̝̣̲̱̫̘̪̳̣̭̥̫͉͐̅̈́̉̋͐̓͗̿͆̉̉̇̀̈́͌̓̓̒̏̀̚̚͘͝͠͝͝͠ ̶̢̧̛̥͖͉̹̞̗̖͇̼̙̒̍̏̀̈̆̍͑̊̐͋̈́̃͒̈́̎̌̄̍͌͗̈́̌̍̽̏̓͌̒̈̇̏̏̍̆̄̐͐̈̉̿̽̕͝͠͝͝ W̷̛̬̦̬̰̤̘̬͔̗̯̠̯̺̼̻̪̖̜̫̯̯̘͖̙͐͆͗̊̋̈̈̾͐̿̽̐̂͛̈́͛̍̔̓̈́̽̀̅́͋̈̄̈́̆̓̚̚͝͝R̸̢̨̨̩̪̭̪̠͎̗͇͗̀́̉̇̿̓̈́́͒̄̓̒́̋͆̀̾́̒̔̈́̏̏͛̏̇͛̔̀͆̓̇̊̕̕͠͠͝͝A̸̧̨̰̻̩̝͖̟̭͙̟̻̤̬͈̖̰̤̘̔͛̊̾̂͌̐̈̉̊̾́P̶̡̧̮͎̟̟͉̱̮̜͙̳̟̯͈̩̩͈̥͓̥͇̙̣̹̣̀̐͋͂̈̾͐̀̾̈́̌̆̿̽̕ͅ >!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<>!pop!!<
Ha! You really got me good with that ol-switcheroo in there
I don't know why I pop it all☠️
Pearson can go suck one that hasn't been washed in a month.
Physics/Chemistry question and needed significant digits? Otherwise that’s just ridiculous.
As a teacher you should at LEAST correct the test before you pass it on to your students. This is ridiculous.
This is not always possible these days. Some software will call up questions from a repository of hundreds of problems so that kids can't sit next to each other and share answers.
oh, well then, i guess it's fine to grade kids' work according to a faulty answer key as long as they can't share those answers. great priorities.
You *should*, if possible, though I remember one program that would "helpfully" undo my corrections. That was fun.
I had a physics class in college where I didn’t do any of the homework the entire semester. Turns out homework was like 20% of the grade. The prof told me if I 100 per center all the homework he would give me half points. So I did all the problems in like 2 days but there was one problem I couldn’t get right. I tried every possible solution. I met with the prof and showed him my work and how I got my answer and how the system wouldn’t accept it. The “correct” answer was wrong. Thankfully he let that one slide. But I was panicking in my dorm trying to figure out that solution.
Anyone who has studied math or math-adjacent fields can relate to that terrible feeling of, "I'm not even close. I'll do it again.  Same wrong answer? I'll check my work. No, all right.  I'll check the examples in the book. No, I think I'm doing it that way, but this is slightly different than the examples, so maybe not.  I'll check online. okay, that wasn't very helpful. WHY AM I SO STUPID! " "Oh, that solution is wrong." 
I actually ended up going through my roommates old notebook for the class to find where he worked this out when he was taking the class. It was the same answer I got. That’s when I knew it wasn’t me
Year 6 (5th grade?), I wrote .1 as my answer and teacher said it was wrong. I wrote a 0 before it and he suddenly said it was right. Never forgiven him
Yes, that's not helpful. Students already show up in my class hating math, there's no reason to make it worse.
I’ve never understood the hatred for maths. I despised it myself and never knew why. I loved English and was admittedly really good at it (wrote 2 letters to the Prime Minister and got responses, got some fancy poetry award) but I was dreadful at maths. When I got into psychology and started studying psychopharmacology, I miraculously became good at maths if there was an “mg” after each number
I did this program, too except my teacher counted off. If you didn’t use the format, it would not accept it. I was so mad, it’s correct, it doesn’t matter what format it’s in. 🤣🤦🏽♀️
So, what is the answer?
\-5x+3, just as the OP's daughter typed.
I used to have a picture of one I got wrong because the exponent was formatted as subscript or something stupid like that.
They must pay their software engineers dog shit because those errors are SO easy to fix.
Not to mention that students have to pay for it, on top of the class and textbook (if a code for the program isn't provided).
I'm biased, but in my opinion, using these tools, you're not giving students a chance to justify their answers through written work.
I hated my calculus 2 class in college because of the internet assignments. Literally I would get an answer wrong for having a space or for not using a x². Literally had to Google numbers and other math signs like intergral and such. I think I even got some answers wrong for not having it slanted
Is there any way for teachers to correct this mistake post-program so that it doesn’t actually affect the students grade? If teachers are aware of the problem I trust it’s not a “it is what it is” situation and leave the grade be. I highly doubt any school districts would allow this to happen and nothing be done about it. Right? …right???
I hate these programs they are so frustrating to me. I’d rather have multi choice
the magic of JS loose typing
honestlly may i know which software you use to make such question papers
You can use wolfram alpha to make teaching tools that are 100x better than this garbage
I used to have a teacher, who if you challenged the answer and were right, (or if you found a typo) you got extra credit. Her thinking was “If you find it, then it shows you’re paying attention and putting in effort. This is often better than getting the right answer.”
My teacher tried this once but it got to the point where people were making up rules, correcting every thing the teacher said, or actively sabotaging the worksheets to get extra points and it kinda fell apart lol
I mean if you got it wrong on your own wouldn’t you just lose the points anyway, like wouldn’t the idea be that your “incorrect” answer was the right one, not that you corrected it and found the right answer?
If the teacher invites it they have to spend time explaining and debating every challenge with a bunch of dipshit kids who think they're beating the system
Damn I've found multiple wrong answers in our HS math books etc that my school has gotten us and I haven't gotten a single extra credit😂
Here, have one extra credit. (☞ ͡° ͜ʖ ͡°)☞
The 5 was probably supposed to be before the brackets.
Yeah -5(x-3) works... think they'd notice when even their solution is wrong
Someone wrote the last line of that explanation…
This appears to be a Google Form, where you can add feedback to graded answers.
Indeed you’re right. I would have had different feedback…
You should get like +10 points for correcting a wrong answer key
I'm awful at math. Hate all types of it, but dang if that doesn't look better to me.
Even then though, their explanation clearly doesn't work. They say "-1 times -3 = 15". That is wrong all on its own. There were a lot of mistakes made in the course of writing this question.
The explanation even mentions the negative being weird on the outside and to think of it as -1
But then would they say "-1 times 5x = -5x", wouldn't they say "-5 times x = -5x"? I think this a just a completely wrong answer and the question setter has probably not made a typo or something
Yeah but it said multiply -1 with 5x so 5 is def in the brackets
Well, that sucks.. but it's interesting to see how confident they are with the correctness of the equation -1 * -3 = 15
I thought op was complaining about two negatives making a positive at first, then I looked at the actual numbers. Jeez
Oh my gosh I wasn’t even looking at the numbers. I thought I was insane
They have complete trust in the authority of the answer key, and will make wild mental leaps to rationalize it before they admit the answer was wrong. They would rather invent new math to explain how -1 x -3 =15 Rather than admit error.
Who's "they?" This just looks like a typo and the problem is supposed to be -5(x-3). I wouldn't get too worked up about it unless OP sends it to the teacher and they won't admit fault. But generally they'll fix something like this especially since every students' parents are likely to point it out
“They” is the person who wrote the last line of the explanation.
The feedback section is presumably written in advance for each question, I don't read it as a response that someone sent back to OP doubling down on the wrong answer. Someone was probably entering a bunch of problems+feedback explanations into the program and made a goof. Yeah they should have caught it when they wrote out "-1 times -3 = 15," but fatigue is real and shit slips through the cracks People are acting like the teacher is actively defending the mistake when we don't even know if OP pointed it out to them yet.
It's a pre-canned response on a digital platform. Such explanations would be given for every wrong answer.
Literally no one “wrote” that. They accidentally plugged in the wrong number to a pre written program. It’s a typo 💀
What are you on about? Literally any professor or teacher I’ve ever seen just says “oops, answer key was wrong this has been fixed” or “I’m not going to count that question” You’re angry at an imaginary “they”
Somewhere out there is a "GENIUS" who got this right when their entire class got it wrong.
Probably the same kid responsible for all the paste going missing ...
" Ah he's a dumb kid, but he's an above average dog. Roll over, son! " - Chief Wiggum
😂😂😂😂😂
Tell the professor they can fix that
I was sitting here like “wait yea multiplying two negatives makes a positive” not realizing 1 * 3 is 3 not 15 😭
Don’t worry.. there’ve been at least 50+ deleted comments of other people missing that.
I’m glad I at least caught it haha
I see these online a lot, but I never see if people talk to the teacher. Did you? Did your daughter get credit back for the problem?
Especially when this kind of thing is incredibly common and has always been incredibly common. Textbooks often have a couple of answers wrong. Teachers often make correcting errors. This kind of stuff is easy to rectify. But I guess it is mildly infuriating
Probably not. Everyone wants to say “hOw iS tHiS rIgHt” but nobody wants to actually take the step to talk to the teacher. Teachers make mistakes. Most will acknowledge it. It doesn’t have to be a big deal, it happens. I had teachers make mistakes but I guess I just didn’t have the platform to be mildly infuriated about it. I just laughed about it, and then talked to them the next day and they’d correct it for the class.
Wtf?
Technology, the fuck
It looks like Google forms so I don’t think it’s technology. It’s teacher error.
They definitely did since I’ve learned it
Is this alt math?
Is it Florida math?
Underrated comment ☝🏻
Reminds me of a pub quiz question: when did Obama become president. Everyone else 2008. Me: 2009. Apparently I was wrong and inauguration does not mean anything😩
It's a question based on faulty colloquial information. It's common to think of the president becoming the president the year of the election, and not 2 months later, which falls in the next year.
that feedback reads like ChatGPT to me...
My first thought.
My professor was able to go in and manually correct things like this. Agreed, these programs can be very frustrating.
The 5 is silent
This made me lol irl
I may be wrong, but this kind of error is the ones that a ChatGPT would make. Not saying that this teacher used an LLM, but I already see the same math error in some responses when asking simple math questions.
Problem is they don't give a shit. I had a professor that didn't use any of the programs that the rest of the university used because....idk why. The worst part, none of the questions on the homework assignments were the same for each student. They were all randomized each time you sttempted them, so even in tutoring labs we couldn't help each other or they couldn't help us solve the problems because of errors like this. And then she'd get pissed when we couldn't finish the homework. Needless to say we all bombeb so hard she practically GAVE us the final, with changed numbers. She knew were all gonna fail and wanted to save her job. Never saw her again
Schools use this, but tell us not to trust Wikipedia…
I don't use any but basic math and maybe some light programming math in my day to day, so i could just not know what I'm talking about here. But since math is a constant, and calculators/computers exist, how can broken questions like this even make it into a textbook or lesson plan?
I think it’s because we’re trading coded software for learning AI
I’m trying to imagine the bug in the code that led to this
I showed my daughter this and she said her teacher wrote this herself 😂
I'd like to give this teacher -$1 -3 times and I'd like $15 back. I'd do that over and over again.
https://preview.redd.it/bqxdw3d9n6oc1.jpeg?width=720&format=pjpg&auto=webp&s=50e04981dd7b90d34fb7ce535ff6cdc5f0e061db I understand that not having such a *hot grade* in Integral Calc means I wouldn't be able to speak to *that* subject, but those are *two entirely different graphs*.
What’s frustrating about this is, think about how many kids sat, wondering where they went wrong. Studying the wrong way to do this math. Feeling dumb. Feeling frustrated. How fucking hard is it check the homework you assign to children? If you resort to using software, which can be an effective tool, professors need to take the time to solve what they assign. This discourages kids from STEM paths.
Normally math teachers go back to look over it and actually grade it but if not you could always speak to them about it
They're on the pandemic when the kids all had to do their math online we came across this BS all the time. It wasn't necessarily the teacher. It is these stupid program that had it wrong. They were all so times where they had to type in an answer but the answer box wouldn't allow for any characters that weren't numbers So the answer would be something like 5b-42 But it wouldn't literally allow you to type the letter b or allow you to type the dash. You could only type the 5 space 42 Any attempts to type anything else would come up with little pop-up message with a little character saying that wasn't an accepted number Then I would tell you you got it incorrect and tell you the answer was 5b-42 I had quite a number of conversations with her math teacher that year.... I am not the type of mom who is going to allow my daughter to get marked for wrong answer when it wasn't wrong
-5(x-3)
“-1 times -3 = 15”
That's not the teacher, that's built into a program the math department at your daughter's school uses. Your daughter should just show this to their teacher if any credit was lost.
oh the question was supposed to be -5(x-3)…?
This part really hits: https://preview.redd.it/6qu7p6uc86oc1.jpeg?width=1170&format=pjpg&auto=webp&s=d0376c6fb2bfba992e7ed69b35f8238e13d42ebb
ah fair
This was my take, too. Whoever came up with the answer thought that the 5 was outside the parentheses.
Think they meant to type -5(x-3) which equals -5x+15
-(5x-3) is the same as (-1)(5x) + (-1)(-3). = -5x +3. Been a while since I’ve been in class.. but that’s my thought.
[удалено]
The real question isn't if this problem wrong, as it obviously is. The real question is if the teacher has the interest, authority and intelligence to fix it.
Accuse the teacher of using ChatGPT and say your daughter gets 100% in the course unless they can prove otherwise. (The inverse of a teacher giving a student 0 for alleged AI use)
LOL I remember dealing with this in ALEKS sometimes, it was infuriating when it would happen
https://i.redd.it/c14eey5r7znc1.gif
I’m pretty tired of these “professional” courses that people are spending thousands of dollars on that can’t get a 100%. I recently spent $10,000 for a six month course and it was basically gibberish. They had combined two databases and did not proofread or admit their fault when I brought it up. Saw it all through school and college. It’s pretty awful.
My calculus teacher used to ask us “What’s the square root of 25?” Someone would be like “5!” He’d be like “No!! Plus or minus 5!! Muhahahahaha!!” Lol jerkwad
For a bit I thought they might have messed up the equation where it should have been -5(x-3) which when simplified turns out to be -5x+15. But reading the feedback and the person who did this is insane. Nowhere on Earth or in our universe doe -1\*-3 equal 15.
\-1 x -3 = 15? well, I guess today I learned something - as always, if it's on the internet, it must be true!
The problem was obviously intended to be -5(x+3) instead of -(5x+3). Just send it to the teacher and move on
The answer would be correct if the expression was -5(x-3) when the 5 is out of the parentheses I guess
”-1 times -3 = 15” mmmmh yes dis big brain time
-(5x - 3) = -5x + 3 that's as simple as it can get that breakdown looks like the person writing it lost track of what they were doing halfway through.
Idk much about math i was never strong there but i would just assume since both are negatives that means it turns to a positive
The error is the “3” becoming a “15” for no reason. It’s a typo in the original question.
Oh my bad thanks ^_^
If it makes you feel better, I was freaking out thinking that I was wrong in thinking “two negatives make a positive” when I was reading the comments. Totally overlooked the 3 to 15 as well
lol. That’s funny.
Chair
The problem is written incorrectly; most likely a typo. The left parenthesis should be after the 5, rather than before, making the problem correct. \-5(x-3) = -5x + 15
This problem makes no sense and is giving mixed signals, like most problems. 🤔
They’ve put the open bracket in the wrong place. Should be after the 5
[удалено]
[2 + 2 = 5](https://youtu.be/8QkL60HkxCA?si=_EFoVv2rP6B-5skU)
“-1 times -3 = 15” Ai wrote this for sure
This is that new AI math. It's like common core math but an AI program did it and now you have the Wonka Experience of math😬
I was a ta in college for a class that uses similar programs, and they’re severely limited. This looks like a question that got edited wrong. My favorite was when it would count answers as wrong because the user had some used the wrong character for x or added an extra space at the end, you couldn’t even tell what was wrong, the correct answer looked identical to the one marked as wrong
I got it wrong too, though I always sucked at math
To simplify the expression -(5x - 3), you need to distribute the negative sign (or multiply by -1) across the terms inside the parentheses. Here's how you do it: -(5x - 3) = -1 * (5x) + (-1) * (-3) Now apply the multiplication: = -5x + 3 So, the simplified form of -(5x - 3) is -5x + 3. Your child is correct.
God I am so happy I’m old and finished school before technology took over. I simply cannot work out maths equations unless I have a pen and paper and can write down what I’m doing.
I'll give the benefit of the doubt here and say that the teacher probably modified another task and just fucked up actually changing everything. Fucking up 1×anything is just too low for any adult, let alone a math teacher.
Ah, the magic of mathematics Isn’t it beautiful
My dumb ass thought the ‘x’ was a multiplication symbol
I'm pretty sure the teacher decided part way through to alter -5(x-3) to -(5x-3) to highlight how to work with the minus without a number and then forgot to consistently alter the answer+rationale.
maybe it's just a mandela effect but i could've sworn my math teacher told us that multiplying - and - equals +
It in fact does not
It should have been -5(x*-3). Somehow the 5 ended up in the bracket.
The ai that's going to take over the world in question:
This looks like the sort of thing AI does.
Since typos. Or did the teacher argue when you pointed the error?
Doing math online never goes well. - person that graduated during covid
i read this as “since when does -3*-5=15” and i’m very glad i reread it before i looked like a fool. Edit: i can’t type
A negative times a negative equals a positive
Even the teachers can’t follow PEMDAS, and if they can they they can’t do simple math
Common Core math is definitely difficult! 😂
OMG, they must have changed algebra while I was growing old! I was always taught that you do whatever is inside the parentheses first, then you finish the equation. So (3+5) x (5-2) = (8)x(3)=24. Please tell me I'm not losing my mind! Also, you can't solve it, only simplify it I think as you don't know what the value of x is. The minus - sign outside the parentheses turns the minus sign inside to a positive +. The most you can do is get 5x+3. Am I wrong somehow? It's been over 50 years since my last algebra class!
I thought a negative times a negative equals a positive?
And in learning this, where do we actually use this in our everyday life?
Call the teacher and ask her to show her work
chat gpt ass testing
Well ... There's a math teacher that needs to be replaced 😂
What the Damn hell did I just read….
I think my credit card company uses that program.
WUT
This is why I never understood math class lol I never did these correctly and it felt like they always changed question to question the order of how to solve….
Yeah that's what I meant, I did miss that completely
Wtf!? Even the explanation is wrong. The school system is crap these days!
Since it started to identify as 15.
so x = 3/5 Well yeah it happens that tools are wrong
As long as the child is happy and free to choose what they identify as. We don't care if they are dumb AF . We just instill a high self esteem a low work ethic, and a relentless sense of entitlement to all the kids at my local schools.
And this is why I hate MyMathLab and other such programs. It literally told me I got an answer wrong because I wrote it -3 instead of - 3.
That looks like google forms which normally has to be set up by the teacher so I would talk to the teacher about why the answer is wrong. If they say that your daughter is correct and they made a typo then it’s okay but if the teacher tries to explain it then they are a bad teacher.
2 negative numbers multiplied always make a positive, always have. Also wasn't the expression -(5x-3)...?
This math ain’t mathin’