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

12 күн бұрын

Yep, same here.

@tony8074

11 күн бұрын

Same here too!

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

got it 15 thanks for the easy PEMDAS

@ameliabenson2570

14 күн бұрын

15

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

Wonderful teachings. Thank you 🙏🏾

Thanks for explaining

b) 6

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

Love these math moments in my day 😊

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

D 15

Thank you

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

Solved in my head in 15 seconds.

@eagle-eye29

19 күн бұрын

Wow

Answer: 15

Good mental maths problem no calculator needed

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

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?

D15

According ro Bodmas formula 15 is right answer

d) 15

D. 15

Hi 👋☺️👋 thanks 👍

All you need to say is: Division BEFORE Subtraction.

d. 15

D

15

d is right answer

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

@gavindeane3670

12 күн бұрын

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

@sueshow401

12 күн бұрын

@@gavindeane3670 oops!

Is it 15?

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

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

9 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.

15. PEMDAS is absolute!

@flagmichael

14 күн 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

11 күн 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

The first one is B) 6

15!!!!

Bothered: NO ~

Fun.

THIS IS BETTER THEN SUDOKU AND CAN BE FUN

Bidmas ans=15

d

2

Is it F.O.I.L.?

b..the result is 6

6

12

B

PEMDA S

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

The answer isb

15…PEMDAS

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

21 күн 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

21 күн 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

14 күн 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

11 күн 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.

15, in my head

Theanswer is 15

6 sl

Six

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.

It's 6

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

Fifteen

The correct answer is 6

@gavindeane3670

9 күн бұрын

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

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

23 күн бұрын

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

@terry_willis

23 күн 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

22 күн 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.

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

BOMDAS

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.

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.

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

@gavindeane3670

12 күн 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

12 күн 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

11 күн 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

11 күн бұрын

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

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

12 күн бұрын

Surely you jest!

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

22 күн бұрын

Welcome to TabletClass Math lol

@jeffrobbins9931

20 күн бұрын

Then don’t watch princess

@randylazer2894

20 күн 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

19 күн 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

19 күн 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.

D 15

D) 15

Answer: 15

15

D

6

B

d) 15

d) 15

16

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15