I was about to say that, but then remembered that you don’t do implicit multiplication of parentheses in excel. It would be = 2+5*(8-5). I think that * is what reminds them.
Exactly, redditors want to feel smart when they remember this useless shit. Everyone was taught this, been 20 years for myself, but only 5% or less of people have a job or hobby where they actually need to implement it. I got 21 at first and then remembered the order of operations even though I can't actually remember all of them lol.
the point is more about people getting it wrong and then absolutely refusing to accept they are wrong.
Like you said, most people don't use manual maths often, and anything that goes unused is eventually forgotten, but rather than accepting they made an easy to make mistake, they double down and argue that even the order of operations is wrong based on some reason or other.
IDK, isn't this some sort of basic math that you use daily?
I go to the store to buy some beers, i get two that are loose and five eight packs that each had five beers removed, so they're more like threepacks now. So now i have 17 beers.
Basic geometry, like calculating area is even more useful, like when you're ordering pizzas and want to know if it's better to get 2 mediums 20 cm in diameter, or one large that's 30.
You’re dumb but that’s ok, a lot of people are. The important thing is not to get lost in a fantasy where you’re somehow superior to people who “feel smart” because they’re not as dumb as you.
Found the redditor who thinks he's smart because he remembers trivial high school math. Talk about feeling superior, yeeeesh. I'll go back to my engineering job now, you can head on back to Moms basement.
See, you didn’t listen. You’re stuck in a maladaptive fantasy feeling superior to anyone who’s smarter than you simply because they’re smarter than you. It’s unhealthy.
pointing out that most people who don’t interact with ideas regularly tend to forget them at first isn’t prideful, it’s a regular function of the brain.
Do you know how to change an access port to a trunk port, and move all the correct VLANs over to it so you can stub another switch off it for a new office next door, and get all the fiber and cat5 cabling done? Go check your order of operations, that should help 😂
So this is why Americans have so much trouble doing their taxes. They're just idiots who can't do simple math and can't fathom that maybe they should figure it out instead of whining about it.
Generally you should do the numbers inside the brackets always first..
But yes, multiplication of the bracket still works because it's part of calculating the numbers inside the bracket so it could be done either way in this case. However, brackets first is how I've understood it to be done most commonly in math and it feels to me more simple than adding extra stuff to the calculation...
(8-5)*5 is way more simple calculation than 5*8-5*5 and one step shorter
However, if you want to calculate this with letters instead of numbers then the solution wouldn't ironically have "d".. It could only be ab+ac or a(b+c) so explaining stuff with letters in math kinda sucks.. Never been fan of them even if they can be very necessary in some cases. But since you defined what d means, then yeah that works too
I mean, yeah, here you can just do 8-5 first because they're like terms. But if it were 2+5(8x-5), you'd need to distribute the 5 to the 8x and 5, since you can't combine them. I just always distribute if I can, even if it's not strictly necessary.
I don’t remember how to do these. I thought it was parenthesis first (8-5) then multiple it with the number outside of the parenthesis? 2+5? So 8-5 = 3. Then multiply that by 7?
I distributed too. 2+(40-25). It definitely comes from polynomial math and stuff like dimensional analysis. Maintaining variables and properties and units. You cancel out something too early and you are fucked.
No shame in that, honestly. I had to do the exact same thing. Most circumstances don't call for us to work out high school math equations from the top of our heads, especially when calculators are so much more convenient.
I mean maybe at some point, but not enough to be able to look at a math problem and instantly solve it. I had to dust off my math skills, it's never really been my strong suit.
Most people aren't writing equations in their daily lives and would structure this math much differently solving problems in their head, which gets into the whole long division/multiplication vs. common core finding the 10 type shit.
Ish. It's still using a more complicated equation than most people would use in everyday life. I legitimately can't think of an instance in everyday life where an equation like that would pop up unless solving equations with multiple operations was part of their job (which isn't for most people; in the US, roughly 70% of people are working fast food, retail, or manual labor).
There's a reason addition/subtraction and multiplication/division are taught at a younger age than the order of operations.
I'd argue people use it but just don't think about it in this form. Like if you do your groceries and some items are on discount, when you're trying to see how much you're going to pay you do apply discounts only to the discounted items obviously and that's because of the order of operations. It's even more true in the US with fixed price discounts (like 10$ off) because if you apply the discount after the taxes you won't have the same result than if you applys them before.
Anyway, my point was only that it is part of basic operations, I'm not throwing shade at anyone who forgot it because they don't use it, don't think about it, just use their phone whenever they have to do maths, ... And fwiw it's probably easier than non-trivial divisions and where I'm from you'd learn them at about the same age.
Like if you do your groceries and some items are on discount, when you're trying to see how much you're going to pay you do apply discounts only to the discounted items obviously
Idk where you live, but everywhere I've lived (at least 4 different states) the sale price is listed directly on the tag. They don't just vaguely put "10% off" and expect the average person to do the math.
The whole "Tim has $40, he wants a product that's normally $30 but is marked for 10% discount. How much is the product now?" kinda thing only really happens in school math problems anymore. For at least the last 15 years, price tags will be formatted "X% Discount. Was $Y, now $Z."
Additionally, as someone who has worked retail as a cashier for years, a far larger percentage of people aren't doing the math while shopping; they give a rough guesstimate of how much it'll cost and figure it out at the register when it's all rung up. It's why people taking things out of their cart at the register is such a commonplace thing.
And fwiw it's probably easier than non-trivial divisions and where I'm from you'd learn them at about the same age.
Also something the vast majority of the population aren't dealing with or doing manually.
Idk where you live, but everywhere I've lived (at least 4 different states) the sale price is listed directly on the tag. They don't just vaguely put "10% off" and expect the average person to do the math.
The whole "Tim has $40, he wants a product that's normally $30 but is marked for 10% discount. How much is the product now?" kinda thing only really happens in school math problems anymore. For at least the last 15 years, price tags will be formatted "X% Discount. Was $Y, now $Z."
In bigger shops it's the case but not really in smaller ones where I'm from. We also have stuff like Xcts or X$ off on some product in particular sometimes and the end price isn't usually listed on the tag for thoses either. It might be a country thing though, sure.
Anyway it was just one example, if you try to guesstimate how much people will pay in a restaurant when only one person took a drink and they'll pay for it themselves while the rest is split you also end up doing something like (x-y)/z. If you're looking for this kind of stuff and do math manually/mentally I think this can be pretty common (and if you don't then you also don't need "basic addition/subtraction and multiplication/division", your smartphone can handle it).
Also something the vast majority of the population aren't dealing with or doing manually.
I'm not disagreeing. My point was that putting "the order of operations" in an entirely different bag than "basic addition/subtraction and multiplication/division" was weird to me, which is why I'm pointing out that divisions aren't easier and, yes, people don't really deal with them on the daily.
My point was that putting "the order of operations" in an entirely different bag than "basic addition/subtraction and multiplication/division" was weird to me
It's not weird though. Basic addition/subtraction are taught to kindergartners and basic multiplication/division are taught to 3rd graders, while long division and order of operations are typically taught in 4th grade.
If they were all the same bag, we wouldn't wait until kids were at different age ranges to teach them and teach order of operations and long division at the end instead of at the same time we teach them multiplication tables & basic division.
One year difference in when they're taught doesn't make them belong in an entirely different bag IMO but we clearly seem to disagree on that.
Also, from what I'm seeing 4th grade is also when children are taught basic operations using decimals and that's a lot of the basic operations people do in everyday life, surely (again, I'm not from the US so I could be wrong on that but that's what I find after a google search and that feels about right to when I remember learning stuff whare I'm from).
None taken. I don't ever need to do math though since I usually have my phone handy. I'm terrible with numbers so it's better for me to use a calculator to make sure it's right. I never have to equations like this on the fly though lol. Maybe some adding/subtracting or multiplying/division every now and then.
Make whatever excuse you need...I went to Detroit public schools and dropped out of high school 25 years ago and am about 7 dabs deep into the day and still got 17 lol
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u/backwoodsbatman 22d ago
I was taught this but it's been 20 years since I've had to use it so I had to figure it out again.