Do you think math is easy?

A correct answer explained by mathematician
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[@ddognine]

The division symbol along with PEMDAS should be banned from math teaching. There is a reason you never see it in higher math. Ambiguous notation needlessly confuses students and burdens them with minutiae that does little to sharpen their math skills and only serves to frustrate them and hate math more.

[@Kyrelel]

The obelus symbol is deliebrately designed to be unambiguous, so blame the Americans. They decided to introduce their own interpretation of the mathematical rules (contrary to every other country on earth), including a unique interpretation of PEMDAS.

[@alicebob8324]

A good lesson in how to poorly communicate a solution to a problem that is poorly communicated.

[@rupakrath6611]

bro I gaurentee you will succeed soon in the field of Mathematics

[@Kyrelel]

Please stop doing this !!! Not only are you using PEMDAS incorrectly, but you are also ignoring the symbols used. The correct answer is 1 The obelus symbol means "what is on the left of it is divided by what is on the right" -- the symbol itself is an "example" it's usage, so 4 ÷ 2(1 + 1) means 4 4 ----------- = ------------ = 1 2(1+1) 4 PEMDAS ... Parentheses does NOT mean "calculate anything in parentheses" ... it means "Remove all possible parentheses" So 4 ÷ 2(1+1), per PEMDAS, would be 4 ÷ 2(2) but, as we still have parentheses, we solve ... 4 ÷ 4 = 1 To illustrate the usage more clearly, let x = 2(5) and y = 5(2) We can agree that x = 10 and y = 10, so x / y = 1 We would likewise expect each example below to equal 1 .. using the correct method ... 2(5) ÷ 2(5) = 1 2(5) ÷ 5(2) = 1 5(2) ÷ 2(5) = 1 5(2) ÷ 5(2) = 1 But, using the "information" given in this video ... the _incorrect_ solutions would be: 2(5) ÷ 2(5) = 2 x 5 / 2 x 5 = 10 / 2 * 5 = 5 x 5 = 25 2(5) ÷ 5(2) = 2 x 5 / 5 x 2 = 10 / 5 x 2 = 2 x 2 = 4 5(2) ÷ 2(5) = ... 25 5(2) ÷ 5(2) = ... 4

[@kampkrieger]

This is 5th grade and you still got the explaination wrong

[@seanmay9181]

PEMDAS is the American rule. BODMAS is used in the UK.

[@RealMesaMike]

Both represent the same thing. Neither is a "rule." Both are just acronyms to be used as a mnemonic device to help beginning math learners remember the precedence of a few basic math operations.

[@rupakrath6611]

hope all doing good

[@angeldude101]

So i think math is easy? Yes. _People_ are hard. The math in this question is easy, but the people writing the problem deliberately make it harder than it should be to confuse people.

[@krullben]

This is not actually maths. No mathematician would ever write this.

[@user-ky5dy5hl4d]

This explanation is confusing; division and multiplication should be of equal importance. Because on the list we see multiplication from top to bottom first and one may think that you should multiply first in the expression in the video. So, multiplication and division are on the same level and you do one of them depending which comes first from left to right. The PEMDAS is just a bunch of unnecessary confusion.

[@redwall1521]

The issue isn't PEMDAS. The issue is there's something called "implicit multiplication" - x = a/bc. Applying strict PEMDAS to the above would basically mean you divide a by b and take this and multiply it by c. "Implicit multiplication" means that we "implicitly know" (hence, the implicit descriptor) that b and c are paired together by multiplication, so it actually would mean you divide a by the product of b and c. Either way, if you really had a problem like this written out, you could very much argue that the question posed is ambiguous, or if you were a student and wrote it out this way (on paper, if you somehow couldn't write with a horizontal division, or if you had to type it out, why you couldn't use extra parentheses), then you'd probably get taken points off for an ambiguous expression.

[@BloodHawk31]

This is a common math question on social media and the answer is the question is wrong, it is made to question the rules and the rules, depending on what you want to do, says you should have a second set of brackets. Even if you input this into your calculator, it will add a set of brackets. Question is wrong, the rules of PEMDAS apply. This question or similar questions have been answered before and the rules did not change.

[@lars9925]

The video is correct. I learned exactly that in school. And PEMDAS stands for Parentheses, Exponents, Multiplication/Division, Addition/Subtraction. Multiplication isn't before Division, and Addition isn't before Subtraction. Those operations are on the same level.

[@RilianSharp]

ooo isn't rules, it's conventions, and different contexts can use different ooo.

[@angeldude101]

​@@lars9925BEDMAS is a mnemonic, not a rule. The only actual rule is "write in a way that people will understand." There are reasons why POMDAS is the way it is, but once you understand those reasons, the mnemonic becomes completely obsolete and even _hinders_ further understanding.

[@lars9925]

@@angeldude101 It's not just a mnemonic, it's a convention to adhere to the order of operations (however you call it: PEMDAS, BEDMAS, BIDMAS, Punktrechnung vor Strichrechnung, etc). If you don't follow the convention, people will not understand. So in order to "write in a way that people will understand" you have to adhere to PEMDAS etc., thus it's basically a rule. If you don't want to use this, feel free to define your operations differently... before every single mathmatical work you do. People who adhere to the order of operations can save themselves the effort to do so.

[@angeldude101]

@@lars9925 This video follows the mnemonic, but violated "write in a way that people will understand." It's a deliberate showcase of the mnemonic failing its job. Oh, and you _can_ write in several ways that can be understood without following _any_ precedence rules. There's putting parentheses around every operation, or you can abandon infix in favour of prefix or postfix notation. Or you can write out the entire expression directly as the tree it's supposed to be parsed into.

[@RilianSharp]

multiplication by juxtaposition takes precedence over division.

[@redwall1521]

lol no. That's "implied multiplication" which just isn't a thing, and you can't say it as if it had 100% truth.

[@RilianSharp]

@@redwall1521 look up "multiplication by juxtaposition".

[@angeldude101]

@@redwall1521 I wasn't aware that y = mx + b was invalid equation. It can't be implied multiplication because you claim it doesn't exist, but it can't be explicit multiplication because there's no symbol between the m and the x.

[@redwall1521]

@@angeldude101 I meant the fact that I believe that "implied multiplication [takes precedence over division [and other multiplication]]" that "isn't a thing" Anyway, it's very clear in cases like "mx + b" actually is just "m * x + b", with people who have graduated from middle school algebra just say it as "em ex plus bee" because it's "simpler" that way, instead of saying "em times ex plus bee". Us using shortcuts to say a simple slope intercept equation doesn't change the fact that there is explicit multiplication there.

[@rupakrath6611]

and ans for this question is

[@rupakrath6611]

04

[@foogod4237]

This video is wrong. The actual _correct_ answer is: *Both 1 and 4 are correct answers because **_this representation is ambiguous._* This is precisely why _the division symbol (÷) is never used by serious mathematicians_ when representing real mathematical formulas. It has also been shown that the "PEMDAS" rules that are commonly taught *are not how most mathematicians actually do math,* and in fact that in practice, division and multiplication usually _do not actually have equal precedence_ in most cases. For example, if you were to write "3 ÷ 2x", the "2x" is actually a form of multiplication; _however,_ pretty much all actual mathematicians would _always_ interpret that to mean 3 ÷ (2 × x), _not_ (3 ÷ 2) × x as traditional PEMDAS rules would suggest. (PEMDAS is also inconsistent with the traditional operator precedence rules used in most computer languages, so the answer to questions like this can also be different depending on whether they are being asked _in a computing context_ or not.) *In short:* PEMDAS is a lie, and this question can be legitimately interpreted to mean multiple different things.

[@mikasm3717]

Correct answer is 1 4/2(1+1) =...

[@user-ky5dy5hl4d]

No. It's 4.

[@krullben]

No, the correct answer is: Use brackets!

[@user-ky5dy5hl4d]

@@krullben More correct answer is: life is absurd.

[@krullben]

@@user-ky5dy5hl4dIn general it is. But in this case, it isn't. It is just a poorly worded expression.

[@user-ky5dy5hl4d]

@@krullben Perhaps.

[@rupakrath6611]

WHATS UPPPPP

[@RilianSharp]

if n=10, what is 1/2n?

[@Jablicek]

n * 0.5 or 1 / 2n ?

[@janami-dharmam]

actually the question is wrong because the multiplication sign is missing. If we write 1/2*n, many will interpret as (1/2)*n and not as 1/(2*n). Whenever we have two operators at the same precedence level, we evaluate left to right as a convention.

[@RilianSharp]

@@Jablicek if it were the former, any mathematician would write n/2.

[@RilianSharp]

@@janami-dharmam the question is not wrong. multiplication by juxtaposition is the standard among mathematicians. have you never taken an algebra class? the slope-intercept equation for a line is y=mx+b. they don't write m*x, they write mx. **and multiplication by juxtaposition has a higher precedence than division.**

[@krullben]

If you leave out the multiplication sign, it is an implicit multiplication. There are implicit brackets around (2n).

[@rupakrath6611]

hlo bro

[@mathsmood]

What is the correct answer? What do you think? The best support for me is to click the like button below the video. Thank you very much😀✋

[@nonmicusstuporus3559]

correct answer is: terrible formatting creates an ambiguous arithmetic problem. use fraction bars like a civilised person to avoid confusion. there is good reason the divide symbol isn't used after like what, middle school?

[@flummer7]

If you want this expression to be 4 with juxtaposition it should simply be written as: 4(1+1) / 2. Much simpler and no ambiguity. So actually the only correct answer to 4 / 2(1+1) should be illegal notation, since we must always write expressions in the simplest way and avoid ambiguity. However if we do write 4 / 2(1+1) the correct answer is actually 1. Because of Juxtaposition this is a grouped multiplication which has higher priority than normal division. and grouping is done at the P step in the actual order of operations. It is exactly the same principle as when we use grouped division, then the grouped division also has higher priority then normal division. To illustrate this, if we write same expression with only divisions we can write normally as 4 / 2 / 2 = 1. Or write it grouped using fractions notation for the division so we write is as 2 over 2 like this: 4 / 2 --- 2 = 4 Here the fraction still means 2 / 2 as above but noone would question that 2/2 is done first because of the fraction notation everyone recognize the division of 2/2 must be done first. Used to be the same for the notation for grouped multiplication, but unfortunately that is no longer the case. Since Division and Multiplciation has same priority, then grouped Division and grouped Multiplication obviously also has same priority. So the question is how do we in fact write a grouped mulltiplicantion. Well Juxtaposition is how. So we can write the multiplication as ungrouped as 4 / 2 * (1 +1) = 4 (Edit had wrong result of 1 here). We can also write it with a grouped multiplication 4 / 2(1+1) = 1. It is exactly the same as 4 / 2X where X is (1+1). If anyone thinks that is 4 they need to retake algebra 101 and especially study coefficients. If we simply substitute X with the value it represents do you really think the result changes, of course not. So in conclusion for both Division and Multiplication we get either 4 or 1 depending on whether we use grouped notation or not.

[@angeldude101]

The correct answer is {1, 4}. If you want just a single number instead of a set, then write a question that isn't deliberately ambiguous and preys on the mathematical ignorance of the general populace.

[@krullben]

The correct answer is to use brackets. Whoever wrote this expression will know what it means, and they should express it unambiguously. This is not a maths problem. It's a communication problem.

[@rupakrath6611]

bro plz shoutout my name in your next video (RAM)