(5 + 4) x 2 - 6 / 2 brackets first 9 x 2 - 6 / 2 now multiply 18 - 6 / 2 now divide 18 - 3 = 15

Solved in my head at the thumbnail, the answer is d) 15, thanks to PEMDAS. 0) ( 5 + 4 ) 2 - 6 / 2 -- Starting state 1) ( 9 ) 2 - 6 / 2 -- Parentheses 2) 18 - 3 -- no Exponents, so Multiplication and Division, from left to right 3) 15 -- Addition and Subtraction, left to right. Final result.

@fredflintstone8048

Ай бұрын

Yep, same here.

@tony8074

Ай бұрын

Same here too!

@lynnfrog2029

12 күн бұрын

They will tell me 15 but I still say b

got it 15 thanks for the easy PEMDAS

@ameliabenson2570

Ай бұрын

15

got it correct because of "Please excuse my dear aunt Sally" love it

I love your videos. I learned the PEMDAS and now solve your challenges quickly (without watching the entire video). A+++

D. 15 PEMDAS in my head

I really enjoy your KZread videos it has truly helped me and give me a little bit of courage I truly feared and thought I was horrible at math I was afraid of these types of basic math because they were so traveling for me but you really explain the PEMDAS and I like How are you explain it if the vision is first you do it first if multiplication is first you do that first if addition is first after multiplication and division you do it first and order some traction as before the addition you do it for us thank you so much you’ve made life a little more easier for me I’m gonna have to watch probably 1000 more of your videos

Thanks for explaining

Love these math moments in my day 😊

I made it 15. Taking in mind the ‘BODMAS’ rule!

We were taught BODMAS which stands for: Brackets, Of(powers/roots), Division, Multiplication, Addition, Subtraction

9*2-6/2 18-6/2 18-3 15

D 15

15 is the right answer. Bracket first then division, followed by subtraction

My 80 year old brain still works! The answer is 15😊

😮I disliked school and I hated Math. (I then taught school for 31 years, not math, but art). Maybe one of the reasons for my dislike may have been because some things were not explained sufficiently. I never heard of the acronym, PEMDAS ever when I was at any grade level in schools. I’m so glad i noticed this video, and will be brushing up on my math skills. (I did learn to love my students and I almost wish I had not had to retire at all).

Solved in my head in 15 seconds.

@eagle-eye29

Ай бұрын

Wow

Thank you

Good mental maths problem no calculator needed

All you need to say is: Division BEFORE Subtraction.

Answer: 15

According ro Bodmas formula 15 is right answer

15 but where in the real world would one see such a math problem? Like at Walmart or at the grocery store is what I mean?

@petersearls4443

9 күн бұрын

In a poorly written piece of software.

D. 15

ANWSER: 6 FIRSTLY: left brackets, then multiplication, NEXT: division THEN subtraction

@gavindeane3670

Ай бұрын

You seem to have got the sequence of operations correct, but 18 - 3 is not 6. It's 15.

@sueshow401

Ай бұрын

@@gavindeane3670 oops!

@imagseer

3 күн бұрын

@@gavindeane3670 The division component is in a virtual bracket and the expression therefore was probably a little disingenuous

@gavindeane3670

3 күн бұрын

@@imagseer It's not disingenuous. It's intentional. The entire point of it is to teach the precedence rules. It's the basic grammar of mathematical notation.

D15

b) 6

@user-yn2to5dt5m

4 күн бұрын

My answer as well, but it's wrong. 15 is correct

d) 15

d. 15

Hi 👋☺️👋 thanks 👍

Good job

D: 15

d is right answer

If you don't know the answer don't go to college. It'd waste their time and your money.

I learned that the thing to remember was BODMAS.Worked for me😊

15

D

D 15 no calculator

Wonderful teachings. Thank you 🙏🏾

15. PEMDAS is absolute!

@flagmichael

Ай бұрын

PEMDAS is only recognized in the USA and France. BODMAS is the equivalent in most other locations. As a math-head since the early1960s, I regard relying on "magic decoder rings" like PEMDAS/BODMAS as a rookie move. It is inexcusably sloppy compared to using nested parentheses.

@gavindeane3670

Ай бұрын

​@@flagmichaelAdding parentheses to add clarity is fine, but you can reach the point where too many of them become visual clutter and then they reduce clarity. We don't need silly acronyms and prescriptive algorithms for the precise sequence in which every operation must be performed, but the fundamental convention of multiplication having higher precedence than addition makes mathematical notation more clear and more readable. For example, nobody wants to have to write a quadratic as a•x²+(b•x)+c when we can just write ax²+bx+c

@lynnfrog2029

12 күн бұрын

No it's not and I proved it to many!!

@lynnfrog2029

12 күн бұрын

Have a calculator that backs me up!!

@gavindeane3670

11 күн бұрын

​@@lynnfrog2029It'll always get you the correct answer to anything that involves only the operations and notation that are covered by PEMDAS - that's the entire point of it. But of course there is plenty of notation and operations that PEMDAS doesn't cover. Strictly surging, he's gone beyond the scope of PEMDAS in this video with the use of implied multiplication, although it doesn't make any difference.

I AM WRONG!... I WAS AN ENGLISH GRAMMAR MAJOR AND NOW I KNOW WHY!

Bidmas ans=15

THIS IS BETTER THEN SUDOKU AND CAN BE FUN

Is it 15?

The first one is B) 6

15!!!!

15 of course PMDAS

Bothered: NO ~

D=15

6

It's 6

12

B 6

Answ 15 use BODIMAS

2

So why do I ever need to know this? Ridiculous.

d

Dear you tube math man, us here in th UK don't use P.E.M.D.O.S we use B.E.D.M.A.S. just thought I'd let you know.

@andrewm6424

Ай бұрын

Dear johnlakin5895, we in the USA use P.E.M.D.A.S. NOT “P.E.M.D.O.S”. Also, I thought you guys called is B.O.D.M.A.S. NOT “B.E.D.M.A.S.”.

@andrewm6424

Ай бұрын

Also, “Brackets” = “Parentheses” and “Exponents” = “Orders”. They’re the same thing, and we’ve heard about it in the US. Please Excuse My Dear Aunt Sally is just easier to remember.

@flagmichael

Ай бұрын

@@andrewm6424 That points out one of the deficiencies of PEMDAS/BODMAS; it is a magic decoder ring that has no roots in mathematics, but is taught as a crutch. Ditch it and use nested parentheses to reduce the chance of misinterpreting the expression. The acronyms are just plain sloppy.

@gavindeane3670

Ай бұрын

​@@andrewm6424When teachers feel they need to give you a mnemonic for the mnemonic, that suggests there's something very wrong with the teaching strategy.

D if I am wrong I don't know how.

The answer isb

Six

Is it F.O.I.L.?

15…PEMDAS

b..the result is 6

@petersearls4443

9 күн бұрын

You have to complete 6/2 before you do the subtraction.

Theanswer is 15

B

6 sl

PEMDA S

whats really funny about math is unlike other subjects, math wants you to learn new math rules making more confusing, rather than just right the equation in the order they need to be figure with parentheses if any need to be done first, pemdas is silly, for instance in reading music, they notate the music as easy as possible so it can be played, i know math people will get all up in a huff, just curious, does pemdas have any value in the real world besides school math class?

@gavindeane3670

29 күн бұрын

Yes. It makes mathematical notation clearer and easier to read. Without the "multiplication before addition" rule, which is the bit that can seem counter-intuitive at first, mathematics would be more cluttered and less readable. The convention has been around for a few centuries now. It evolved for a reason, and it wouldn't have stuck if it didn't make things better.

@nfpnone8248

13 күн бұрын

@@gavindeane3670 You are totally wrong, PEMDAS and BODMAS are crutches that try to explain mathematical principles, but with all crutches, you must know what each part means, and that “P” does not mean what is inside the parentheses, it means everything attached to the parentheses too: For example: a(x + y)^b is a parenthetical statement which must be completely simplified before you can do any other operations, which is why people how use PEMDAS always get questions with implied operators wrong!

@gavindeane3670

13 күн бұрын

@@nfpnone8248 I don't know who told you that, but you need to stop listening to them because they don't know what they're talking about. Somebody has given you a really basic, fundamental misunderstanding of what parentheses mean and what they are for. This is one of the problems with these stupid acronyms. People are taught something called "order of operations" but it has P for Parentheses in so people naturally think, like you have, that "Parentheses" must be an operation. That's complete nonsense and nobody would ever think that if we ditched these stupid acronyms and just taught people what the symbols mean and what the precedence rules are. There is no such thing as being "attached to" parentheses. You have completely misunderstood the issue with implied multiplication. If you want to understand it properly, look up the difference between PEMDAS and PEJMDAS. That will explain the issue you are talking about, without the need to completely redefine the meaning and purpose of parentheses.

@nfpnone8248

13 күн бұрын

@@gavindeane3670 I am a R&D Product and Process Development Engineering Manager, and I have had more math education than you can even imagine, and without parenthesis we could not separate problems of that complexity to solve them. Try again genius!

@gavindeane3670

13 күн бұрын

@@nfpnone8248 Did you look up the difference between PEMDAS and PEJMDAS? I have explained how this stuff works to more people than you can possibly imagine. Your understanding of parentheses in mathematical notation is incorrect and the chances of you coming up with an argument I haven't seen before, and explained the flaw to dozens if not hundreds of people before, is pretty much zero.

b

15, in my head

I enjoy the refresher, but edit sir! We don’t need frowny 13:42 faces, etc. please be more concise. I want to keep watching these but so much wasted time!

If you where teaching me I would have fallen asleep.

15 🤓

Fun.

You should have started your lecture with pemdas. Working out the wrong way just reinforced that. Not good.

I like your videos and learn from them. The problem I have with them all is that they're much longer than they need to be and you talk them to death. They could easily be cut down to a third of the time without loosing relevant valuable information. My God it gets to the point of being painful. All the unnecessary little tangents you go on... You often repeat yourself. In a live teaching situation that's fine, it's normal but on a video that can be replayed where needed, if needed? No. And I say all this even though I listen to you at 2X. I would be willing to bet that you will get more views if you cut them back to a reasonable length. My guess is that if you look at your stats you don't get many viewers that actually finish, or finish without skipping ahead through sections.

Write it algebraically to avoid confusion. There is a reason higher level math uses fractions and not the ÷ symbol. A novel is not written with 1st Grade sentence structure and vocabulary so math shouldn't be any different. Take 2*2÷7 and 2÷7*2 as the person writing it down may have made a mistake on what is in the denominator or numerator 4/7 versus 2*(2/7) or 2/(7*2) or (2/7)*2. This would turn 14 minutes into 1 minute of explanation. My point is complex math should not use kindergarten arithmetic but use algebra. I beleive there is a reason that i have not seen a problem like this since 5th Grade. This is an easy problem but if we are talking about something more complicated, there is high chance of error in writing it and solving it.

@jeffbeard5200

Ай бұрын

Meanwhile I got the answer in the first sentence of your comment! 😂

@terry_willis

Ай бұрын

If the problem format had used a horizontal line instead of the division symbol (as you suggest) and had 2 as the denominator, I would have likely done this incorrectly. I may have subtracted the 6 first and then divided the simplified numerator by 2 yielding the wrong answer.

@gavindeane3670

Ай бұрын

​@@terry_willisBut in that case only the 6 would be above the horizontal line so you would have known that only the 6 is divided by the 2. Using a horizontal line with numerator over denominator is the normal way to write division and the best way to write division, so in general that's how it should be written. Not here though, because the entire point of this question is to teach the grammar of inline notation.

The correct answer is 6

@gavindeane3670

29 күн бұрын

It's not 6, it's 15. ((5 + 4)2 - 6) / 2 would be 6 but that's a different question.

Fifteen

I don’t know where you learned math, but you are lost in the weeds! The key to this problem is the minus sign that connects the multiplication and division, therefore simplifying will result in a very straight forward expressio: (9 x 2) - (6/2)= 18 - 3 = 15 If it took you more steps than that, then you are on the wrong bus, and notice, I never used PEMDAS!

@lynnfrog2029

12 күн бұрын

There was no brackets around 6/2 also your 6/3=2not 3

@nfpnone8248

12 күн бұрын

@@lynnfrog2029 First, I can put brackets or parentheses anywhere I want. And 6/2 = 3, I made a typo, but the answer is right, I’ll correct it so nobody else is confused!

@petersearls4443

9 күн бұрын

But you knew to put the parens around 6/2 because of the Order of Operations.

@nfpnone8248

9 күн бұрын

@@petersearls4443 No, I just used the parentheses to separate the problem into its component parts, nothing to do with order of operations. Actually once you know what the operations mean, then you know everything is addition!

@gavindeane3670

7 күн бұрын

​@@petersearls4443Order of Operations does two completely separate jobs and only one of them really matters. Consider an example like 1+2+3+4×5. Firstly, Order of Operations gives you a set of precedence rules which tell you, in this example, that only the 4 is multiplied by the 5. We do not add 1+2+3+4 and multiply all that by the 5, because multiplication has higher precedence than addition. In other words, my example is equivalent to 1+2+3+(4×5) This is the critical bit. Secondly, Order of Operations dictates a sequence in which you must actually PERFORM the operations. In my example, Order of Operations says you start with 4×5 = 20 then do 1+2+3+20 = 26. This is the unnecessarily rigid bit that doesn't matter at all. For example, there is nothing wrong with doing 1+2+3=6 to get 6+4×5, then doing 4×5=20, then finally 6+20=26. I think the person you replied to is only concerned with the first bit.

BOMDAS

Bbbbbb

Yeah, thanks. Solved in less than 8 seconds. Smh

Got 15 in seconds. This is elementary stuff, did in school when aged 7 to 8. And i am in my 80s.

To be accurate you said the answer in one second, more like 15 seconds! Ironic especially when espousing accuracy! Although I do like checking my answer with your accuracy. It is good to confirm my understanding of maths now that I am retired and older. Science and mathematics in school does not seem to be recognised for it's intrinsic value. As a result a crazy WOKE culture has exploded that even politicians and governments have embraced. Seems to me GAI (General Artificial Intelligance) could benefit society?

@calvertwilliamson4721

Ай бұрын

Surely you jest!

What a crock. There are lots of order of operation rules. You just propound one.

@gavindeane3670

Ай бұрын

Not sure what other rules you have in mind but the only order of operations rule that matters here is that multiplicative operations have higher precedence than additive operations. That rule is ubiquitous and fundamental to the way mathematics is written so there's no doubt what this notation means (unless you want to suggest that his use of ÷ instead of / for division introduces some uncertainty?)

@stanleyreynolds7800

Ай бұрын

@@gavindeane3670 When I was in college, there was a simple rule about mathematical expressions. Parenthesize everything exactly or face the wrath of what the compiler will do to you.

@gavindeane3670

Ай бұрын

@stanleyreynolds7800 If there's a complier in play then you are dealing with a programming language. For any programming language there is only one precedence hierarchy or order of operations that matters: the hierarchy set out in the definition of that language. That definition is the absolute authority for what a particular expression means in that language. Outside of that language it is irrelevant - it has zero authority. Here we are dealing with mathematical notation, not a programming language. What this expression might mean in any given programming language is irrelevant. The only thing that matters is what it means in the language of mathematical notation. And the grammar rules of mathematical notation tell us that this expression evaluates to 15.

@stanleyreynolds7800

Ай бұрын

@@gavindeane3670 Yeah, the computer rarely has the safety of infinite precision. And guess what? We live in the computer age.

Why did it take 13 minutes to explain this expression, for which it succinctly should have occurred in two minutes. This is poor teaching to be so incredibly inefficient

@okopecz

Ай бұрын

Welcome to TabletClass Math lol

@jeffrobbins9931

Ай бұрын

Then don’t watch princess

@randylazer2894

Ай бұрын

@@jeffrobbins9931 What a remark of ignorance for which between you and me, you likely aren't the one who has run 25 marathons, climbed the highest mountains in the continental US, worked out every day for 3 years straight, Next between you and me, you aren't the one who took all of the math courses required for a PhD at Duke and Michigan State, and who has an MA with a specialization in international finance. Nor did you teach math at two universities and one of the top 10 private schools in the US (at the time), Cranbrook, for which the current base tuition is $40,000 per year. With that.....I have corrected many math videos so people won't be instructed wrongfully, for which you were completely clueless. My intent again is to not have math taught wrongfully, or in a confusing manner. So I made a comment in good faith, but you not simply sought to mock and insult. The next time you want to make a demeaning remark to a man by calling him "princess".....do that to somebody who won't kick your ass athletically, or with math, and with life in general. Understood?

@elladumaplin6922

Ай бұрын

@randylazer2894. There are those of us who are not as smart as you and are so willing to learn,so……HUSH! Or, do not watch? Nobody is forcing you to watch. Just saying.

@randylazer2894

Ай бұрын

@@elladumaplin6922 You completely missed the point. That having taught math at two universities and one of the top 10 private secondary schools in the country (at the time), Cranbrook, where current tuition is $40,000 per year, I stand against teaching that is grossly inefficient. That is the point, of not how smart I am per your words, but that for what could have been a 90 second video, which would have students understanding in roughly 1/8th of the time, this constituted a disservice. When somebody provides legitimate criticism of inefficient teaching for the betterment of learning, don't ever tell them to hush, unless you support having people waste their time and potentially be confused on a very simple topic.

Your channel does more harm than good. But hey how it’s all about clicks isn’t it.

This is annoying. His explanation is ridiculous.

Такую ерунду разбираете слишком долго,это можно объяснить за минуту

I AM A BLACK AFRICAN CAPE VERDEAN 71 YR EXPERIENCED MAN....

D) 15

D 15

Answer: 15

15

6

12

D

B