Order of Arithmetic Operations: PEMDAS

[@supercoolninja]

First : 7^2 = 49, 11-9= 2, 3*2 = 6 6 + 49 = 55 Second : 4-7 = -3 4/2=2 -3 + 5 + 2= 10 (5 - -3 = + so that's why we add) 5 - (4-7) + 4/2 = 10 Third = 5+1-3 = 3 3^3 = 27 27/9 = 3 2+3 = 5 Four = 1+3=4 4^2 = 16 2*16 = 32 12/6= 3 3 + 32 - 9 = 26

[@Zubaidah-232]

I don't understand the second question

[@lukasloganmusic]

Second one is still confusing me

[@supercoolninja]

@@lukasloganmusic Imagine in your head you walk 4 step forward then next you walk 7 step in back count how many step did you walk back from where you are until the last. (+4) - (+7) = 4 3 2 1 0 -1 -2 -3 (-3) + (+5) + (+2) = -3 + 5 = -3 -2 -1 0 1 2 = 2 2 + 2 = 4. so (-3) + (+5) + (+2) = 4.

[@Adittya1710]

In the first question u did substraction first according to pemdas we have to have multiplication first right

[@Adittya1710]

In the first question u did substraction first according to pemdas we have to have multiplication first right

[@lovve_buzz]

i definitely didn’t forget what pemdas was over quarantine

[@ikimiyu]

you’re not the only one.

[@robbelk1982]

Wow I never enjoyed learning math, until now thanks

[@mysterioussoup3393]

The awesome thing is that I actually get where I went wrong on the comprehension questions rather than having my teacher to "Well you didn't use my method". Bro I got the same answer!!!

[@ava_grabowski7]

IT IS ACTUALLY PLEASE EXCUSE MY DEAR AUNT SALLY

[@dyms3846]

No it's Please End My Depression And Suffering

[@ava_grabowski7]

@@dyms3846 lol you are very right the corona virus sucks

[@WailingFriend]

Please End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And SufferingPlease End My Depression And Suffering

[@lawaa1236]

Lmao why ?

[@kallielol3235]

Yeah we know

[@dharam5924]

We use BODMAS (Bracket open-divide-multiply-Add-Subtract.

[@ava_grabowski7]

COOL I USE PEMDAS PLEASE EXCUSE MY DEAR AUNT SALLY

[@WailingFriend]

Please End My Depression And Suffering

[@lawaa1236]

Yeah same

[@clearflow7925]

what about exponents

[@bikram_kumar]

Yes

[@RafaelTNSG1245]

as an new grade 11 student, thank you math jesus.

[@sharobabelberhanu]

maths Jesus what is that supposed to mean ?

[@melmel6253]

@@sharobabelberhanu I think he's saying that cause he thinks Dave looks like Jesus.

[@Jours-rouges]

How did it go

[@Jasmita-8]

Thanks for the beautiful session professor Dave!

[@slowpoke8585]

I gotta say, I love the little groove music during the "Checking Comprehension" segment. Feels like I'm doing a little video game tutorial. Ha ha.

[@drspamelot1494]

Thank you for your wonderful channel! My son is a great fan! :)

[@VoidFox57]

I know this is 5 whole years later but I’m binging this. Is there an explanation as to why this is the convention that was settled upon? Like why this specific order and not a different one?

[@TheDefterus]

I was actually sort of upset to not have it mentioned in the video, but your hunch is right, there's a good reason for this specific order. It comes down to properties and definitions of operations that are covered in more detail in different videos. To make a concrete example, consider 6 + 4 * 2. Blindly following PEMDAS, 6 + 8 = 14, which is correct. But more importantly, multiplication is repeated addition. You could just write 4 * 2 as 2 + 2 + 2 +2, the order for 6 + 2 + 2 + 2 + 2 is obvious, or rather irrelevant. you can do the those five additions in any order, because of it's cumulative property. Parenthesis are not even operations, simply ways to show stuff like 4 * 2 as something like (1 + 3) * 2 for situations where it makes sense. If you didn't know pemdas or had the more useful general understanding, you might do 6 + 4, THEN * 2. But notice, that would change the fundamentals of the question. (6 + 4) * (2) is not the same as (6) + (4 * 2), because addition and multiplication can not be rewritten this way while keeping the same end result. The notation we are using in modernity is just that, notation. If we only teach a way to read it "aloud", instead of what it actually says, a lot of the use is lost in my opinion. Another qualm I have with PEMDAS, is that Division is actually just multiplication by the inverse of the number you used for the division. 5/2 is really just 5 * 2^(-1). Subtraction is actually just addition by the negative of the number you used for the addition. 5 - 2 is really just 5 + (-2). There's historical and higher concept reasons for not generalizing like this in every case, but it's not like those are taught in school before you learn of PEMDAS anyway. If you consider only Exponentiation, Multiplication and Addition, the reason for the order is a lot clearer. E is Many M, M is many A, so we go from the top until everything is just addition. When doing algebra it's useful to go the other direction sometimes, and group additions into multiplications to solve more difficult problems, but the point is to preserve the value of the line while computing things, not to stick to an order handed down from on high. If you were to come up with a different order that is as rigorous as PEMDAS's origins, you would have to redefine/restructure these operations in a way that changes their properties, basically start a completely new math.

[@PrometheusDev-b6b]

Thanks Professor Dave.

[@parzival5034]

I'm 15 and I struggle dealing with math

[@tinnwenweoo9997]

me too bro im a homeschooler

[@hi-bx5de]

Tinnwenwe Oo99 lucky person

[@SaifulIslam-qe4ml]

Same

[@dedicationofdilawar]

I'm 25 and still struggle with maths age is just a number.

[@janiraipala45]

I'm 35, an engineer and i struggle dealing with math :D

[@SuperAlexGaga]

Amazing, thanks!

[@comoyun]

You make difficult topics increribly easy!

[@abuemad2392]

In one of the equations, our answers were different because you did subtraction before addition, but I do addition first as they are not the same step.

[@VidmanXX]

How is it -6 if you're supposed to do ALL addition BEFORE ANY subtraction? You're supposed to get -22, aren't you? Same with the final problem in Checking Comprehension; I keep getting -8.666 [12 / 36 - 9].

[@0Coeus]

Overall: The "PEMDAS rule" is supposed to help you remember to finish all multiplication and division before you do any addition and subtraction. You can in fact do division and multiplication in any order you like. Then you can do addition and subtraction in any order you like. PEMDAS is a nice help, but is not the whole story. (try it out! for example (2*3)/6 and (2/6)*3 or any combination you like!) For you first question: If you take what I said above into account we get 15 + 25 = 40 40 - 54 = -14 -14 + 8 = -6 Another way to look at it is that everything is addition: 15 + 25 + (-54) + 8 = -6 (Dave explains this consept in his video on negative numbers) For you second question: Why don't I show you how I would do it, and you can compare it to what you tried: 12/4 + 2(1 + 3)^2 - 9 12/4 + 2(4)^2 - 9 -> Parenthesis 12/4 + 2(16) - 9 -> Exponent (also I notice the implied multiplication between 2 and 16 for my next step) 3 + 32 - 9 -> Multiply and Divide 26 -> Add and Subtract I hope this was more helpfull than confusing!

[@omerkaya545]

If it helpful to think of PEMDAS as: P -> E -> MD -> A? First doing parentheses left to right. Then doing all exponents from left to right. Then doing all multiplication and division from left to right. Then doing all additional from left to right. There would be no subtraction because would force ourselves to see would be subtractions as additions of negative numbers?

[@amadorlaput3382]

It is 40-46, not 40-62. Consider -54 as its own number, negative 54. -54+8=-46.

[@griezi_dls8147]

I FUCKING OWE YOU EVERYTHING, STARTING COLLEGE, all those years in school the teachers couldn't teach ME SHIT BUT IT ONLY YTOOK YOU 4 MINUTES TO TEACH ME love YOU!!!!!

[@manori3488]

Thank you!! It is so helpful🥹❤️❤️❤️

[@alyxkrieger6764]

wow, got them all right.

[@bruhifyforever8641]

How did you get this right? I kept trying and always got 20. 12/4 + 2(1 + 3)² - 9

[@pickle5337]

@@bruhifyforever8641 12/4+2(1+3)^2-9 = 3+2(4)^2-9 or 12/4+2(4)^2-9 = 3+2(16)-9 or 12/4+2(16)-9 both of these are then 3+32-9 and finally 35-9=26 hopefully you have already got it by the time i even sent this message and if not i hope this helped

[@chrysabentouli6464]

You’re a savior

[@JudeBrighton]

It'd be helpful to have the steps of calculations of the comprehension answers please, I got lost and this demotivated me.... Thank you

[@redsnabba4947]

Agreed. Math solutions should ALWAYS have a complete list of step by step solutions imo. 1. (3 * 11) - (3 * 9) + 7^2 => (33 - 27 = 6) + (7 * 7 = 49) => 6 + 49 = 55 || 7^2 = 7 * 7 2. 5 - (4 - 7 = -3) + (4 / 2 = 2) => 5 -(-3) + 2 => 5 + 3 + 2 => 8 + 2 = 10 3. 2 + ((5 + 1 - 3 = 6 -3)^3 /9) => 2 + ((6 - 3 = 3)^3 / 9) => 2 + ((3^3 = 27) / 9) => 2 + (27/9 = 3) => 2 + 3 = 5 ||3^3 = 3 * 3 * 3 = 27 4. 12/4 = 3 + 2 * (1+3 = 4)^2 - 9 => 3 + 2 (4 ^ 2 = 16) - 9 => 3 + (2 * 16 = 32) - 9 => 3 + 32 - 9 => 35 - 9 = 26 If anything was unclear feel free to ask :)

[@neilanderson5982]

@@redsnabba4947 Thank you so much bro This really helped me I was lost in the answers cause I was calculating wrong Thank you so much 🙏🙏🙏 You don’t know how much I appreciate this!!!

[@redsnabba4947]

@@neilanderson5982 Glad I could help. I wish you good luck in your future math endeavors :)

[@thehealthpromotion7024]

How he get -6 from the example tho

[@harithmuqry]

Thanks thats help me a lots

[@SuperEDU-h9z]

in Guyana we use Bodmas

[@TSlegacy9]

CASE WHEN ARE YOU GOING TO PLAY SCRUTINIZEDEDD

[@Jackson-b5m]

Who’s here for fun?

[@sophiahank4407]

Me

[@dexterclays2048]

it's insane how i ALWAYS had doubts in equations for the order and i never heard in my life abut PEMDAS, and now it cannot be not clear. I'm italian btw

[@briigo7.501]

Why am I getting 13 for 2

[@0Coeus]

Do you mean the second comprehention task? You could try writing out your thought process here, and someone might be able to shed some light on it :)

[@yd1865]

4-7=-3 5--3=8 8+[4/2]=10

[@ajchoppa4887]

quick question are exponents part of arethmatic ireland’s algebra

[@chandankokane7494]

5-(4-7)+4/2 5-(-3)+2 ? can any one help me to solve this?

[@sunilnamdeo1971]

5-(4-7)+4/2 5-(-3)+2 5+3+2 (because negative multiplied by negative symbol is positive) 5+5 10

[@AnwarAli-fe3jo]

Thank you

[@mehakmariyam2798]

@@sunilnamdeo1971 Bro, you made my day It helped me a LOT

[@ridmicmeena4123]

@@sunilnamdeo1971 thanks bro

[@someonewhomayexist]

@@sunilnamdeo1971 Thanks a lot, I was so confused

[@harrymatabal8448]

Prof well said.

[@chanpiggy3938]

thankyou so much

[@jasminamahic3742]

Thank you !!

[@elizareyes6061]

How do you get -6 on 15+25-54+8? Please someone explain, thankyouuuu!

[@itsallaboutfeeling]

calculate from left to right. 15 + 25 = 25 then 25 - 54 = -16 -16 + 8 = -6 Think your mistake is that you take -54 then you "plus" 8 making - 54 into - 62. Remember the number line: -(minus) ________-54_________0_________+8_____+(plus)> the negative -54 moves into 8 of the positive direction and becomes -44 and not -62 Hope that helps.

[@mattbakker9339]

@@itsallaboutfeeling i think she is confused about how pemdas is calculated in the equation because if you follow pemdas its 15+25 then 54+8 then 40-62 = -22 which is what i got. i think we need a new way of doing these freaken equations because if you follow pemdas to the tee you get the wrong answer

[@0Coeus]

@@mattbakker9339 While you do get the correct answer if you follow pemdas, I can see your point about how it is confusing. Dave does not touch on it in this video, but another way to look at it is if consider all the addition and subtraction as addition: 15 + 25 + (-54) + 8 (Dave explains this in his negative numbers video). Like you said though, this is not at all apparent from the pemdas acronym alone. A final thing to note: while pemdas calls for multiplication before division, they are in fact interchangeable. The same goes for addition and subtraction. This nuance makes for a poor memory cheat though, so you have to pick one, and I suspect they went with pemdas for no other reason than it rolls off the tounge easier than pedmsa :)

[@danielblaze6193]

@@mattbakker9339 yes I was thrown off by that as well. Doing ‘addition before subtraction’ gives -22, so anyway I guess once it gets down to that level we just do it in order of left to right.

[@flavioscorner]

@@danielblaze6193 I had the same dilemma here... I feel less lonely now :-) Thanks!

[@sargismartirosyan9946]

If it was used to do addition the subtraction that's wrong it's not -6 it should be -22 tell me if I'm wrong ????

[@Setebe]

From the Comprehention 3 (11-9) + 7² = 3 (2) + 14 = 6 + 14 = 20. What i missed?

[@ProfessorDaveExplains]

7^2 = 49

[@Setebe]

@@ProfessorDaveExplains Oh. thank you. i forgot it

[@sergeantsentry8864]

​@@Setebe 7² means 7x7 which = 49, not 7x2 :)

[@TSlegacy9]

CASEOH WAS HERE

[@ismailkhan9783]

15+25-54+8 =40-62 = -22

[@petersearls4443]

40-54+8=-14+8=-6

[@lukaszb3233]

We did BIDMAS = Brackets, Indices, Division, Multipilication, Addition, Subtraction 😅

[@williamjuliuskitha4861]

Thank you prof do you offer one on one online maths and physics lessons?

[@MaxW-e2i]

Case never fails to pull girls with his gravitational pull

[@MAEiSLiKESOCOOL]

Thank you!

[@glenns.5561]

Someone PLEASE explain how the answer to the 3rd probelm in the comprehension check equals to 5??

[@shrushtisakhare4610]

2+{(6-3)^3}/9 2+{(3)^3}/9 2+27/9 2+3 =5

[@chillbro2719]

i saw a few people struggling with the second question, so here's the explanation: 1. sort out the brackets, 4-7 is -3 2. sort out the fraction, 4/2 is 2 3. you see that little minus before the brackets? - (-3)? that's going to change it to PLUS 3. i'll explain this in more detail. see, the "-"? it has no number in front of it (no coefficient) so we consider the number to be 1. then, it will look like -1(-3), which is -1 x -3, which will give us +3. two negatives cancel each other out to make a positive. so far our equation is 5 + (3) + 2 (

[@snowgibson1856]

I thought that you have to do addition then subtraction? 15 + 25 - 54 + 8 15+25=40 54+8=62 40 - 62 = -22 If you're following PEDMAS how did you get -6? You didn't exactly explain

[@petersearls4443]

15 + 25 - 54 + 8 = 15+25=40 40-54=-14 -14+8=-6.

[@TRUTH-en6ih]

Cuz you dont add 54+8 as the sign before 54 makes it a negative number so ,so its -54+8 which is literally 8-54 so that makes it subtraction ,so always look for the signs before the number and add the positive numbers as adding negative numbers makes it subtraction

[@just-jiu]

Nope, you do it in groups like P, E, MD, AS

[@TheyLuvBrie]

the face at the end of his song is funny🤣🤣🤣 bvvbbbnnnnnmm,,,,,

[@asiast.lawrence1340]

R y’all here from school 💀🤚

[@kungfubarbie101]

uhhh 😳😳

[@muhanad3947]

Aint the only time I needa watch vids from this dude cuz of school 🦍🗿

[@m8v3n98]

How u know

[@nathanp1019]

I’m looking for a vid to link in a TikTok cuz people don’t know basic math

[@k7hle_376]

@@nathanp1019 Because*

[@azaldenshihab9203]

Mr Dave can you explain the precipitation of protein and how can the solubility or protein solution depends on the charge and hydration of the protein surface ? Please Because I couldn't Understand it.

[@MorrisMobad]

Good job Thanks

[@fezw895]

How to solve last one

[@ebhanansunil8136]

What about BODMAS ??:-( now confused

[@hussamzain7096]

it means bracket of division,multiplication,addition,subtraction.

[@hussamzain7096]

I think for CBSE or somethin like that its BODMAS and for the others its PEMDAS

[@carultch]

The substance of both BODMAS and PEMDAS is the same. It is just different choices for what it calls parentheses (brackets), and exponents (orders). MD and AS are still grouped at the same precedence.

[@sohailabdullah5786]

On 1.55 the 5.3 seem like five point three. It should be 5(3) in my suggestion.

[@kyleesquivel350]

Nice math bro you really help me allot

[@2.2.4.4]

2:13 but in Arabic we do math from right to left so who write the equation have to put brackets to be clear

[@joy7688]

what if there are no parentheses & you must find where to put them to get the answer already given?

[@thepeoplewholovedeeply7675]

@Annie Lin I'm wrong with the second example that given on the end of the video. I couldn't find the right answer which is 10.

[@yakevan]

I used BEDMAS but PEMDAS is much better thank u

[@barrygabriel3062]

Pemdas is wrong

[@0Coeus]

@@barrygabriel3062 how do you figure?

[@hazqier]

@@0Coeus Not sure how to explain it so I'll just let her explain it for you: kzbin.info/www/bejne/on2mdZaXa8mMpqM

[@astroid99]

I just came here to say two things, 1 why tf is it called pedmas on this Video we all know its bedmas (bracket b) and two thank-you for sharing your knowledge professor

[@astroid99]

@LJ29 so weird lol, im Canadian and until this video had never heard the term pedmas, i knew parentheses meant the same thing but idk it makes the term even less a word, like bedmas=bed+mass(minus one s) where pedmas=?

[@thehealthpromotion7024]

How on earth did you get -6???? Cmon professor please explain!!!

[@SL-wt8fm]

it's been 5 months but hopefully you still see this: PEMDAS despite having 6 letters for each operation really only has 4 steps, and should be better written as P-E-MD-AS; that's because what really happens is: 1. Solve parentheses left to right 2. Solve exponentiations left to right 3. Solve multiplication AND division left to right 4. Solve addition AND subtraction left to right The common error lies in solving multiplications then divisions, or solving additions then subtractions, when in reality they are both done in the same step, in order left to right.

[@avarius3361]

On comperhention i got 54 and i double check but still 54 on the first . Isnt 3(11-9) = 5?

[@avarius3361]

Wait nvm . Its 3 × 2 not 3 + 2 . I feel bad for missing out on that

[@0Coeus]

@@avarius3361 feel good for spotting your own mistake! :)

[@DhaunielRichards]

I hope thé people who are doing cxc are watching this may God help you

[@keiziacutesiena6955]

Nice!

[@fragglyone7607]

I've been hearing that this order of operation is incorrect. Can somebody explain this to me? There's a lot of videos about it.

[@angelobullo4400]

how do u get 26 if 14-9 = 5?

[@mysterioussoup3393]

12/4+2(1+3)^2-9 First complete the bracket 1+3=4 Then square it 4^2=16 Then times by 2 2x16=32 Then complete the first division 12/4=3 Then go left to right with the resulting equation 3+32-9=26 Took me a while but I figured it out.

[@adambeaumont2534]

6÷2(1+2) use BIDMAS folks.

[@TheInkPitOx]

I learned PEMDAS in middle school. No one is teaching it anymore it seems. They're trying to teach "more efficient" method.

[@eyyyy3265]

Sir, I know this is a very old video but I would appreciate it if you could still help me. On Question 2, I got 6 instead of 10. I don’t understand how the answer is supposed to be 10. I used PEDMAS & repeated the question a few times to see if I can get 10, but I still get 6. Please tell me what I’m doing wrong. Because as far as I know, you do the brackets first (4-7) which gives you -3. Then you skip exponents & multiplication because there are no exponents & there’s nothing to multiply. So next we do division which is 4/2 which equals 2. Next is addition so we do -3 + 2 which equals -1. And last we do substation so basically 5- -1 which you 6. So the answer to 5- (4-7)+4/2= 6 But apparently I’m wrong. Pls explain what I’m doing wrong😭 EDIT: I don’t know why my writing has a cross line on it, my bad💀 just know that I didn’t do it on purpose lmao

[@chillbro2719]

im not sure if you still need help, but i got 10 as my answer, and i'll explain what i did. 1. sort out the brackets, 4-7 is -3 2. sort out the fraction, 4/2 is 2 3. you see that little minus before the brackets? - (-3)? that's going to change it to PLUS 3. i'll explain this in more detail. see, the "-"? it has no number in front of it (no coefficient) so we consider the number to be 1. then, it will look like -1(-3), which is -1 x -3, which will give us +3. two negatives cancel each other out to make a positive. so far our equation is 5 + (3) + 2 (

[@EditNatio3]

Nice vid

[@shareef453]

pemda, pemdas, pemdas oooh

[@shareef453]

the class N1T4

[@karkocha]

i dont quite understand the second comprehension, 5 - (4 - 7) + 4/2 4 - 7 is -3 4 /2 is 2 -3 times 5 is -15 plus 2, 17 and there are more instances where i calculate 16 or -13 in where i try different methods, i dont understand it can you please guide me through the steps?

[@ensaladadepapaya8511]

5 - (-3) = 5 + 3 It's not a multiplication

[@petersearls4443]

The answer 10 is correct.

[@jamesbonifacio7710]

can someone please enlighten me why the second comprehension was 10 and not 4?

[@khaledabdulaziz6312]

5-(4-7)+4/2 get rid of the parentheses by subtract (4-7) which equal (-3) 5-(-3)+4/2 get rid of the parentheses ; here is the trick we knew in negative numbers lesson that if u multiple any (-)*(-) u will get (+) so it became 5+3 5+3+4/2 divided 4/2 which equals 2 5+3+2 just add the numbers =10

[@amogustheimpoter4580]

what does 4/2 and /9 means? is that fraction?

[@arzalalbuchari7095]

i hope you've found your answer already but it's just another symbol for division, though it can also be a fraction.

[@amogustheimpoter4580]

@@arzalalbuchari7095 Yea ai found out after watching a different video thanks for replying anyway😉

[@brentsevakis9005]

I'm drawing a complete blank on this... i cannot get it

[@hypedhcr2]

In my country its Bedmas

[@Raj-270AgAu]

Isn't it *BODMAS* (Bracket Order Division Multiplication Addition Subtraction)?

[@admiralvirhz]

Seeing your nickname and question I can easily guess that you’re coming from India, since as far as I know you’re thought BODMAS, in Poland we are thought both, and it does not matter what system you use, both produce the same outcome, since both has the same order of operation, but named differently. Just BODMAS is less popular naming. 😃

[@rojay_extreme3098]

the first way you used the negative number but with pemdas u ignore the minus sign?

[@carultch]

In the first way he was doing it, he was playing devil's advocate, and deliberately doing it wrong, to show why you get different answers if you do it out of order.

[@TheKyleFyles]

Here from a stupid internet poll. X = 1 after all.

[@GodIsGracious112]

Is the slant (/) meaning half ?

[@petersearls4443]

It means divide. In this case you would be dividing by 2 so it would be half but that is just a coincidence.

[@chourouk-gr9qg]

Funny how all ppl here from 2020

[@iamstudyingenglish.takeite4352]

2+(5+1-3)3/9=?

[@pgkoutro8678]

9 divides only the contents of the parentheses. So it is finaly 2+3=5.

[@trentjones1979]

@@pgkoutro8678 how do you differ from the entire problem being over 9 compared to just the (5+1-3)?

[@Detective_depther]

@@pgkoutro8678 2+ (5+1-3) =5 but then there's 5^3 how am I supposed to get 5?

[@amrockstars4407]

2+ (5+1-3)³/9 (5+1-3)³ = 3³ [Parentheses] 3³ = 27 [Exponent] 27/9 = 3 [Divide] 2+3 = 5 [Addition] Solution - 2+27/9 = 2+3 =5 "P" "E" M "D" "A" S Order of operations PEDA for this problem. Earlier, I was adding 2+27 and then dividing 29/9 and getting the answer = 3.22.

[@itsrainingbrochill5731]

@@amrockstars4407 literally me lol, thanks

[@Water-nd4xq]

Please excuse my dope ass swag

[@malthus101]

so what about all these videos saying PEMDAS is wrong? (or the other orders like BEDMAS?)

[@petersearls4443]

Multiply and divide have the same precedence and are processed going left to right. The same goes for add and subtract.

[@PersephoneWeiss]

Excuse me po, Professor Dave. Why is my answer in Checking Comprehension in no. 4 is different? My answer is 12, while at the screen, shows 26.

[@petersearls4443]

4 squared is 16. 2*16=32 3+32=35 35-9=26.

[@swanscream5152]

@@petersearls4443 if I can ask, in 12/4 +2 (1+3)^2 -9, where is the multiplication coming from? I'm solving the paranthesis, applying the exponent for 16, doing the division and addition for a result of 5, giving me 21, then subtracting the 9 for a result of 12. Do the brackets somehow add multiplication to it? I've tried watching notation videos and searching but can't seem to turn up much useful.

[@petersearls4443]

@@swanscream5152 hi. Any number to the left of an open paren without an arithmetic symbol between, automatically becomes a multiply.

[@swanscream5152]

@@petersearls4443 ohhhhhhh, i see now!!! thank you so much, this really helps

[@sarra5122]

i get it now

[@sargismartirosyan9946]

Okay I kind of got it but I'm curious 🙂

[@Sec0ndSqu4re]

Team smart people who are refreshing their memory to get smarter 👇

[@aaaaaaaaaaahhhhhhhhhhhhhh6693]

So if not told otherwise I just have to stick with PEMDAS?

[@getachew.]

yes

[@petersearls4443]

Actually you have to stick with Order of Operations. PEMDAS is one of many acronyms to help you remember the order of things.

[@mamadwali4278]

❤❤❤

[@BlueEagle777]

Could you explain me 2nd situation 5-(4-7)+4/2=10

[@Drco_mM]

Simple bro frist do parentheses 4-7 =-3,then do division 4/2=2 ,then 5-(-3) is same as 5 +3 therefore 5 + 3 =8 then add 2

[@ItG8823]

- and a - number is seen as addition, which means you do not perform the later addition first instead simply left to right because it is all interpreted as addition.

[@TheObsidianAsh]

BIDMAS ftw

[@suresranathunga]

💙💙💙

[@YungBl3ss94]

Question what is the answer to this problem 60/5(7-5) I get 24 some say 6

[@ProfessorDaveExplains]

well it's a little ambiguous as you've written it. if (7-5) is meant to be on the denominator of the fraction multiplying the 5, then the answer is 6. if 60/5 is a fraction multiplying a separate term of (7-5), then the answer is 24.

[@YungBl3ss94]

Professor Dave Explains that was a viral problem I just mentioned. People write it as a fraction and get six

[@nyrofautoeboen5210]

I Def didnt use this to explain to my friend to flex

[@kashifalam753]

is it enough for imat

[@andychen8609]

Thank you I’m still a kid I’m 11 years old

[@pennyrice2409]

I don't understand why 55 is the answer on number 1 argh struggle is real!

[@Alex-02]

3(11-9)+7^2= Parenthesis first 3(2)+7^2= Then exponent 3(2)+49= Then Multiplication 6+49= And last Addition 55

[@dedicationofdilawar]

@@Alex-02 bro help me with last q how that ans is 26?

[@dedicationofdilawar]

@@Alex-02 got it 12/4 + 2(1 + 3)^2 - 9 12/4 + 2(4)^2 - 9 12/4 + 2(16) - 9 3 + 32 - 9 26

[@Alex-02]

@@dedicationofdilawar Lol, yeah you did it correctly!

[@dedicationofdilawar]

@@Alex-02 yeah i was confused why do i have to multiply (16) i thought it was out of parentheses when i did 4^2 xd

[@sharminshoroni5868]

What is parenthetical?

[@Managastar]

Brackets

[@rameshpundeer8372]

6 ÷ 2(2+1)=?

[@reesed3060]

9

[@rameshpundeer8372]

A ÷ B(c) = A/B(c)

[@rameshpundeer8372]

X/yz = X÷(yz)

[@priyagupta1633]

How 5 ans came in 3rd question can anyone tell ?

[@petersearls4443]

5 is correct 5+1-3=3 3 to the 3rd is 27. 27/9=3 3+2=5

[@mazenomar7279]

But why we think as mathematcian that rule is correct.how they prove that?

[@Eli_Is_Cool]

The reasoning is arbitrary, the mathematicians decided to do it in this order simply to keep things constant.

[@0Coeus]

Thats the beauty of math, just like any game we invent, we make the rules. But once the rules are set and we start playing, you can't change them as you play :) So why do we spend so much time on this game (math) in school over others like say.. chess? Well it turns out math is not only fun, but also very usefull.

[@vathsalaa2774]

Does pemdas and bodmas give same answers?

[@0Coeus]

Yes! They say the same thing with different words. Brackets instead of Parenthesis, Orders (powers and roots) instead of Exponents :)

[@vathsalaa2774]

@@0Coeus thank you

[@shivanshsharma9504]

@@0Coeus What an absolute blunder statement is that. PEMDAS has Mul first and Division as second however BODMAS has Division first. They do not give the same answers when applied to a equation of multiple operations.

[@0Coeus]

@@shivanshsharma9504 Multiplication and division is interchangeable. You can do them in any order you like and get the same answer. Try it out, and feel free to post an example if you think you find a counter where the order between mult/div makes a difference :)

[@shivanshsharma9504]

@@0Coeus Dude I need not to try it, Mul and Div have same priority by convention but the result is not same everytime. Let me quote an example for your blindfold, what do you think of this expression 8 ÷ 2 x 4. If you div first you have 16, if you mul first you have 1. Dayyymnn, did that hurt your feelings for Mathematics ? Awww.. :)

[@charlie13362ramirez]

weres the operation in the 3(11 and 2(1+ bruhhhhhhhh

[@0Coeus]

When nothing is written we assume that the operation is multiplication. So we get 3(11-9) = 3*(11-9) and 2(1+3) = 2*(1+3). But remember to resolve the parenthesis first, 2*(4)! Why do we do this? It is simply because we are lazy, and want to write is as simply as possible. Just like we would rather write 5*5 instead of 5+5+5+5+5. It may seem confusing at first, but you get used to it, and it is very helpfull when the equations get more complicated :)