Recent comments in /f/explainlikeimfive
Way2Foxy t1_iybutw9 wrote
Reply to comment by unfamous2423 in ELI5 why we first multiply, then add by TheManNamedPeterPan
Which is exclusively because we decided to do it this way as a convention, not anything inherent.
Way2Foxy t1_iybupyc wrote
Reply to comment by nemplsman in ELI5 why we first multiply, then add by TheManNamedPeterPan
>the multiplication and division symbols strictly indicate that the multiplication or division must occur between the numbers on either side of the multiplication or division symbol
Because of the convention of the order of operations. If we instead changed that to say that addition/subtraction is before multiplication/division, then it would be just as valid to say that
2+3 x 4+8 x 7+2
could be arranged as
4+8 x 7+2 x 2+3
AnotherWarGamer t1_iybuozk wrote
It's just a convention we agreed upon. But I prefer not to rely on it, especially while programming. Use parentheses to make things clear. Write (a * b) + c. Not a * b + c.
yogert909 t1_iybunl4 wrote
Reply to comment by orangezeroalpha in ELI5 why we first multiply, then add by TheManNamedPeterPan
I still write parentheses when I don’t need to sometimes, but as I get more comfortable with order of operations it does make things simpler not to have all the nested parentheses in complicated equations.
Tsjernobull t1_iybudfi wrote
Reply to comment by nemplsman in ELI5 why we first multiply, then add by TheManNamedPeterPan
I know so because its 100% just because we agreed on using this ruleset. Try thinking about your reasoning if we mixed it up and reversed the order of operations
DMT4WorldPeace t1_iybu1dy wrote
Reply to comment by RIPdultras in ELI5 Are cows constantly producing milk? by ms_myco
At this point the mother cow is then put into a device the industry coined a "rape rack" so the farmer can stick his entire arm up her vagina to insert bull sperm into her. After a 9 month pregnancy in confinement she gives birth to baby girls who will be put into the same torturous cycle as her or baby boys who are immediately killed.
nesquikchocolate t1_iybtwbk wrote
Reply to comment by Ok_Ad_9188 in ELI5: Why can't you just not eat if you're overweight? by Ok_Ad_9188
Starvation is triggered by hormones, which are released because your stomach is telling your brain it's empty and ready for more. This starts 4-8 hours after your last meal, always. If you interrupt these hormones, like some diet pills did, then you get "magic" weight loss without feeling bad.
But now you're damaging the brain, telling it to ignore basic survival signals - and the brain doesn't run on glucose, so it cannot get fuel from body fat - it needs your liver to create ketones from fatty acids, and when you consume fatty acids, you're adding calories again, which will allow you to survive indefinitely.
orangezeroalpha t1_iybtvaa wrote
Reply to comment by ohyonghao in ELI5 why we first multiply, then add by TheManNamedPeterPan
I feel for you.
nemplsman t1_iybtu77 wrote
Reply to comment by Tsjernobull in ELI5 why we first multiply, then add by TheManNamedPeterPan
I know what you're saying but I don't think so.
Tsjernobull t1_iybtn2x wrote
Reply to comment by nemplsman in ELI5 why we first multiply, then add by TheManNamedPeterPan
You my friend, are mixing cause and effect.
[deleted] OP t1_iybtiah wrote
Reply to comment by ingodwetryst in ELI5: Why do condoms have so many different types (invisible, extra safe, feel thin, etc). How do you know which one to pick? by [deleted]
[deleted]
urgetocomment2strong t1_iybtdxz wrote
Reply to comment by r3dl3g in ELI5: Why is wales a country but not the states of the US by coolredditfan
damn sounds like that one thing about 160 years ago would cause quite a bit of political turmoil, i hope all of this was peacefully resolved in the senate and not in the deadliest conflict in the country's history
unfamous2423 t1_iybtbu3 wrote
Reply to comment by Way2Foxy in ELI5 why we first multiply, then add by TheManNamedPeterPan
As long as the multiplication and division is done, the order doesn't matter on addition and subtraction.
nemplsman t1_iybt6t0 wrote
Reply to comment by Way2Foxy in ELI5 why we first multiply, then add by TheManNamedPeterPan
The numbers that are added or subtracted within a given formula are not subtracted from the number adjacent to them. They are just added or subtracted from the overall series of numbers.
Conversely, the multiplication and division symbols strictly indicate that the multiplication or division must occur between the numbers on either side of the multiplication or division symbol -- so you can't just move those numbers around that are on either side of those symbols.
This being the case, it's necessary to first do the multiplication and division calculations so those operators work first between the two numbers on either side and not along with some other number that is added or subtracted.
NathanTPS t1_iybt5qq wrote
Math is a language, and order of operations is simply grammar to that language. Some times the order of operations makes logical sense, like performing parentheses and exponents first. But some operations, like adding/subtracting, multiplying/dividing see to be able to work regardless if the order. I mean, we do get an answer every time right? Jist different answers. So, how do we know what the "right" answer is? Well, as I said before, we use order of operations in the same way we use gramercy to dictate specific rules in language to help meaning in written word come across without confusing the intent.
Every mathematical operations. Can be analogies tk a real world scenario. A formula that reads, 2+5x3 can give an answer of 17 or 21 depending on whether the order of operations occurs or not.
The way to see what's happennign is to analyze what the problem is saying. This problem is saying, im adding two apples to 5 bags worth or apple, each holding 3 apples. Or 2 apples to 3 bags of apples, each containing 5 apples. That's the principle of of multiplicity. In this analogy we see the answer is 17 and that it makes sense.
Addition and subtraction are a lower ordered operation because they deal with single dimensional operations. Single number of apples vs. Multiplication. And division which deal with higher dimensional math, grouping or fractions. You can't add two single apples to packs of apples containing multiple apples and magically end up with more than what you actually have.
This break in logic is what is happenni g when you add or subtract before multiplying or dividing.
ingodwetryst t1_iybt4pm wrote
Reply to comment by [deleted] in ELI5: Why do condoms have so many different types (invisible, extra safe, feel thin, etc). How do you know which one to pick? by [deleted]
I just tweeted those product images yesterday 😂😂😂
shotsallover t1_iybt4f5 wrote
Reply to comment by ohyonghao in ELI5 why we first multiply, then add by TheManNamedPeterPan
That must have been a fun passing grade to earn.
Ok_Ad_9188 OP t1_iybt120 wrote
Reply to comment by nesquikchocolate in ELI5: Why can't you just not eat if you're overweight? by Ok_Ad_9188
Of course, but once again, you're talking about weight loss, I'm just asking about the human body storing and using calories. Ignore weight in this scenario, it's not a factor. What I'm trying to figure out is why you'd go into starvation mode at all. In this scenario, the subject is taking supplements, a wide array of vitamins, minerals, amino acids, and basic proteins, and they're drinking plenty of water. So they're not suffering from malnutrition or dehydration. They're also obese and have many pounds of fat storage (Barbieri weighed in at 207 kgs at the start of his fast) so they aren't deprived of caloric fuel; why would they go into starvation? Why would any bodily function slow down when it has all the water, nutritional needs and calories it has to perform them as well as it needs? And even if they did go into starvation, they still have to consume calories, and the calories they consume have to come from somewhere. Would the human body really just die of starvation while being completely dietary supplied and with an ample supply of calories still available to it?
Flair_Helper t1_iybsoej wrote
Reply to ELI5: why does it hurt men to be nut tapped but not when they have sex and their nuts smack against the girl? by [deleted]
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[deleted] OP t1_iybsoch wrote
Way2Foxy t1_iybsn7w wrote
Reply to comment by Gigantic_Idiot in ELI5 why we first multiply, then add by TheManNamedPeterPan
>multiplication is doing an addition multiple times.
Only for integer multiplication, though.
Way2Foxy t1_iybskl4 wrote
Reply to comment by nemplsman in ELI5 why we first multiply, then add by TheManNamedPeterPan
> I don't think this is just because we decided to do it this way as a convention.
It is 100% because it's decided as convention.
>BUT, the +4 and -2 and +5 could literally be anywhere else in the formula and nothing would change.
Elaborate?
18_USC_47 t1_iybsjpi wrote
Something that a lot of people don’t seem to realize, even some of the answers already here included, are that net worth does not equal just a pile of money like a cartoon character with a pit of gold coins or literal piles of money.
Net worth is how much everything a person owns is worth.
Including things like real estate, intellectual property, and companies.
For example, Bezos owns about 10% of Amazon. That’s worth about 90ish Billion dollars.
That does not mean he has 90ish billion sitting in an account somewhere.
An analogy that’s more relatable to most people is that by owning a car, it doesn’t necessarily mean someone has 20k in cash at any one time. Their net worth is at least 20k, but net worth doesn’t necessarily mean cash.
Most of the net worth is from those stocks that they own, like Gates with Microsoft. He owned a lot of Microsoft. So when Microsoft gained value, so did he.
So the ownership of these stocks would change (and likely be worth less since someone like Bezos dying would likely lower stock prices) but it just means that part of the company would be owned by someone else.
Outcasted_Maverickk t1_iybv6p9 wrote
Reply to ELI5 why we first multiply, then add by TheManNamedPeterPan
BODMAS - you’ve never been taught this ?