18 / 3 x 2 + 4 =? Most can’t do this in their head RIGHT!

How to do basic mental math calculations.
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[@newstarcadefan]

It is 16, and time to show the work. First things first 18÷3=6. Then we have 6x2+4=? Then we go 6x2=12. From there we have 12+4=16.

[@garywillens7792]

Hi fan. How did you make that divided by sign please? That is so kool. I can only do the slant to show divided by.

[@lookingforahookup]

​@garywillens7792 If you have an android phone, press the key beneath the "up" arrow and you'll be able to see the division ➗️ sign. Hopefully this helps.

[@lookingforahookup]

First multiply 3 × 2. Then divide 18÷6, finally add 4. 18÷6+4≈7

[@garywillens7792]

@@lookingforahookup NOOOOO I want to know how he "Made the divided sign on the computer". I can do / but NOT the line with the two dots top and bottom of it. Plus, your answer is wrong.

[@thenetsurferboy]

But it is [18/6 ]+ 4 =7

[@robduijf2752]

According to the rule of operations PEMDAS the answer is: 16. 🎉

[@lookingforahookup]

18÷6+4 3+4 7

[@kolkattaindia]

Ans: 7

[@survivrs]

I'm saying 16 before the video even starts. It's problems like this that make me feel a little bit better about my lack of math skills. YESSS!!

[@snuffysmith6842]

old way until about 1980 was in a problem like this was you always Add first , Subtract 2nd , Multiply 3rd , then divide last . They changed it to go left to right to complicate things .

[@thenetsurferboy]

Answer is 7

[@markinnes4264]

You should watch the video.

[@thenetsurferboy]

Maybe you need to repeat year 2 at school@@markinnes4264

[@dathyr1]

This one was pretty simple and did it in my head in about 15 seconds. The way the operators are in this problem, just go left to right to get the answer of 16. do the divide first, then the multiply, and last the addition. Whalah - answer 16. Assuming you know basic division, multiplication, and addition. Rules - division and multiplication operators are first to do, then any addition and subtractions are second in order to do. This problem, just go left to right to get the answer.

[@barrieheald5823]

YES! YES!

[@NevervousOtoole]

Another maths question is if you multiple any number by 9 and add all the digits to together till there is only one digit it always equals nine.

[@brianburgess3231]

order of operations 16 .. backwards is 1

[@sso3933]

I was wrong, i multiplied first, then divide

[@tomtke7351]

18 ÷ 3 × 2 + 4 = ? PEMDAS -> suggests that multiply (×) happens before divide (÷) so.. s/b (18 ÷ (3×2))+4 = = 7 however the Google approach is ((18÷3)×2)+4 = 16 so there's a flaw in PEMDAS but there is no flaw with parentheses!

[@petersearls4443]

No flaw in PEMDAS if you look up the definition of it, you will see that it says M&D are equal and processed left to right.

[@newstarcadefan]

The rule is from left to right, and whichever sign you see first you do first (He's done plenty of videos on this). Since we have ÷ first, then we gotta do that first. It's the same for addition/subtraction. They're a packaged deal and whichever comes first goes first. There's no ambiguity here.

[@thenetsurferboy]

You are right Guy does not understand pemdas or bomdas Left to right is crap Taken care of by x first then divide. But brackets ridded first

[@tomtke7351]

okay... let's correct PEMDAS TO: PE(MD)(AS)

[@petersearls4443]

@@thenetsurferboy stop trolling you know you are wrong.

[@kingsfleet21]

The way we were taught in 1950s uk primary school. Pity they dont teach times tables the 1950s way all chanting together and being burned into your brain for instant recall the rest of your days. If they did there would be a massive leap in childrens mental arithmetic.

[@katiesethna]

I agree. We did that daily.

[@elephantintheroom5678]

I homeschooled my son that way. He's grades ahead of other kids in maths.

[@russelllomando8460]

got it, thanks...

[@josephpoley4805]

Left to right is a contrivance which is not valid in many cases. This is explained in other posts. Also the division sign is not proper notation. Here it should be rewritten with 18 as the numerator and (2x3) as the denominator. Then we have 18/6 = 3+4 = 7. I don’t want anyone who thinks otherwise designing anything for me. If you really want one operation done first, put brackets around it.

[@lmcwill0502]

Yippee, I got 100 % I actually was not sure if I were to divide first or do the multiplication first because order matters greatly to get a correct answer.

[@garywillens7792]

Hi 502, In PEMDAS it is Multiplication "OR" Division, which ever comes first, working from left to right. Most people forget the "OR".

[@rainp2034]

7

[@shyphirenflowerchild4631]

Was easy to do in my head. Mind you I use work for a book, map and stationary store years ago that had an antique cash register, 1 calculator and a stack of paper and pencils to do the math calculations. At one point I didn't even need the paper and pencil to work out the discounts, then the 2 taxes and the final total for several items in my head. I'm out of practice now days. lol

[@belomolnar2128]

Wrong script or and unhappy script. Mathematics it is not only Numbers. Via a calcullus there is s. o. going to receive the result. It means firstly write (18/3)…. or and 18:(3x2)…. because who enter calculation ought to have clear situation at the beginning. Wrong start wrong result. 🍀

[@nfpnone8248]

All fixed operators, so the problem can be rewritten as ((18 * 2)/3) + 4 = 12 + 4 = 16. Notice I didn’t use PEMDAS! You must be able to rearrange equations in this manner to get through algebra and definitely before you can proceed to any higher mathematics!

[@afre3398]

In a very recent video you advocated for the use of fraction lines. Why do you not follow you own advice. What you so often do is to present a gotcha problem not a math problem. If this had been written with proper fraction lines the problem would have been quite clear. STOP DOING THIS NONSENSE. You are not teaching math you are teaching ambiguity. I have a university degree in physics, and in higher education. NO MATH PROBLEM IS WRITTEN THIS WAY. And the reason is to avoid ambiguity.

[@tomtke7351]

As a fellow college graduate who's taken tons of computer programming classes, I've found that profuse and extensive use of parentheses is most clear.

[@newstarcadefan]

There's no ambiguity here. It matters not if it's the slash, the fraction bar, or the division symbol...you gotta do the division step first from left to right.

[@afre3398]

@@newstarcadefan The thing is PEMDAS is a lie. PEMDAS is an oversimplification that we teach to children to make things easy. It's like saying that negative numbers don't have square roots. We just want to get on with the lesson. But PEMDAS isn't the way that mathematicians, physicists, or engineers actually evaluate mathematical expressions. If you have had any higher education you should have know this.

[@josephpoley4805]

Well said. My comment made the same point. I wouldn’t hire this guy to teach math.

[@bryanburgos7452]

I got 16 on my head, while using PEMDAS for order of operations. 18÷3×2+4, 6×2+4, 12+4 is 16 which is final answer. I don't even use commutative neither distributive, that's the dumb idea. Using order of operations is so easy to do it.

[@MrMousley]

This is easy to do in your head because it's just left to right .. 18 / 3 x 2 + 4 6 x 2 + 4 12 + 4 = 16

[@chuckandmax7313]

18/3=6, 6X2=12, 12+4=16

[@letsnottalkmovies8613]

16. Final answer. Cue suspenseful music.

[@ilecier]

How do you know that most can't do this in their head?

[@newstarcadefan]

This is a mild one compared to 9x4÷4x9=?

[@thenetsurferboy]

Not all 6 year olds reading this are brain developed yet

[@ilecier]

@@newstarcadefan What's the result? Don't forget to make a 15 minute video about the "problem"....

[@marinecorpswarrior915]

​@@newstarcadefannot so hard the answer is 81. 4×9=36÷4=9×9=81

[@padraicbrown6718]

Another F. Please write your math problems clearly, in an unambiguous format and using appropriate grouping symbols. The answer you want is 16, thus you need to write it like this: ((18 / 3) x 2) + 4 As you have it written, the simplest interpretation leads to an answer that is not 16: 18 ---------- (3 x 2) + 4

[@danieldennis9831]

16

[@user-ri6rn7ti5h]

16 too

[@sherryb5369]

Answer is 16

[@lacynylons6317]

16 - PEMDAS, left to right.

[@user-ri6rn7ti5h]

Yes

[@NevervousOtoole]

A proper maths question is what is the heaviest a 1lb of gold or a 1lb of feather's.

[@thenetsurferboy]

I would need to know if they were chicken, duck or some other type of feather I have a maths question for you A string is wrapped around the earth at the equator. How far would a bird fly to unwind it, keeping the string straight at all times?

[@paulinedean6940]

The same

[@markfx12]

A pound of feathers is heavier than a pound of gold because gold is measured in troy pounds, while feathers are measured in avoirdupois pounds. Troy pounds are made of 12 ounces and avoirdupois pounds have 16 ounces. A troy pound contains 372 grams in the metric system, and an avoirdupois pound contains 454 grams.

[@gieb6428]

If there is moisture in the air the Feathers will weight more

[@robduijf2752]

​@@markfx12😂

[@Mrskateboardboy]

16.. Five secs or less, if it is right.

[@exhibitionistyogapants1220]

I got one right!!!!😁

[@kevinreist7718]

16. Are you trying to trick people into multiplying before dividing and then saying 7?

[@thenetsurferboy]

As someone said, you have to multiply first before you can divide eg. 36/ 3{2 ^2 -8] BOMDAS also said x first Understand?

[@kevinreist7718]

@@thenetsurferboy I think if you watch his video, he will tell you multiply and divide have the same priority so you treat them left to right. Same with add and subtract. I didn't watch it though because this guy doesn't like to write his equations in an unambiguous manner. He refuses to use parenthesis to communicate the intent of the equation clearly. He gets off on tricking people to boost his own ego.

[@terryharrison5355]

You could make this a lot better if you would cut out the un-necessary talking.

[@mylittlepitbull3143]

When you have a KZbin channel you can do it your way

[@freedom8589]

you mean I can control all the KZbin media?

[@kamalnajjar7432]

Don’t you think that your statement in all your videos, “ most won’t know the answer” reflects some arrogance?

[@rc391995]

I6 I knew the answer before I punched the power button on the computer. Lol.

[@freedom8589]

marker voice is good media ?

[@sogent56]

7

[@elephantintheroom5678]

What age group can't do this in their head? Grade 4 kids?

[@saintjohnno]

Ive always struggled with numbers but this wasnt that hard... i had the answer (16 ) immediately..

[@Hiccuple]

How is this video 12 minutes to get to 16😂?

[@readegloeckner6532]

Best comment here

[@user-bs7ue6yz3m]

C'mon !!

[@asphaltandtacos]

Took me only a second to get the answer 😀

[@bluejedi723]

I can't do this in my head because of my ADHD and math based learning disability

[@vincentmontagna1711]

This is not what I learned from two math professors in college..PEMDAS.. NOT PEMDAS??... MULTIPLICATION BEFORE DIVISION.

[@SteveSearle]

16 But why does it take nearly that many minutes to explain?

[@newstarcadefan]

Because some people need the review, and also some people make things a lot harder than they need to when they shouldn't.

[@CindyCockerham]

If I'd had a teacher who explained math like this waaay back in the 20th century, my life would have been much easier.

[@freedom8589]

what is that number mean?

[@MCastronomy]

1.8

[@evakool8241]

16 18/3x2+4

[@bulldog6925]

Answer is 16 - I did in my head. If you had been my math teacher, I would take forever to add 1+1

[@mylittlepitbull3143]

I'm smart

[@australiagreg3179]

This is very simple maths, most baby boomers should have no problem with this.

[@billthorburn7476]

16 Where are the tough ones? 😊

[@paulinedean6940]

16.

[@toofasteddie1]

it,s 16

[@kimberlyweston8466]

18/3X2+4= 6X2+4= 12+4=16

[@soilmanted]

I avoid this problem by not ever using the division sign used in the problem. I use fractions as in algebraic notation. I would put 18 in the numerator and 3*2, which = 6, in the denominator. 18/6 =3. Then add 5 and get 7. However if you use the division sign as shown, the you do Multiplication, division, addition, subtraction. My Dear Aunt Sally. It is still 18 divided by 6 which is 2, plus 4 equals 7. Alternatively one could do division and multiplication interchangeably, and possibly get 18 divided by 3, which is 6, multiply that by 2 and get 12, then add 4 to get 16. But if you don't use the division sigh and use fractions, you don't have any way of getting 16. That 2 cannot go in the numerator. so you can't multiply 6 times 2. In short, i wuold not ever write a math problem the way it is written here. It is ambiguous here.

[@newstarcadefan]

It's not ambiguous. This is basic elementary school arithmetic. Also It matters not if it's the fraction Bar, the slash, or the division symbol, or the division box. All three means "divided by" just as the multiplication symbol, the dot, the asterisk, or a term outside of a parentheses means to multiply.

[@ocioci9222]

22

[@firstgensps]

12

[@vickilindberg6336]

The chick with math anxiety thinks 7.

[@KJVPREACHER7]

Too much talking not enough explanation

[@peterruyter645]

Do you really need 12 minutes and 32 seconds to explain this????

[@annettegollon239]

16 is the answer. What was your degree in John??😂😂

[@randylazer2894]

You are wrong, as is this teacher. Not only did I have an MA in international finance, where I took all graduate courses required for a PhD in math, but taught at universities in Michigan and Nevada, and one of the top 10 private schools in the US at the time, Cranbrook, which has tuition of $40,500 per year. So if I am wrong, you are stating that the math textbooks I studied out of at Duke University and Michigan State in their graduate program, are wrong. That the PhD's who wrote those books are wrong. That the textbooks I taught out of at university are wrong, and at one of the top private schools in the US is wrong. I will prove this video to be wrong, and refer you to a video that "Pemdas" is a lie...or something to that effect. That shares of how engineers and scientists do not operate with this teaching, which is pre-algebra, and simply wrong. With 18/3x2 + 4....it is pretty clear that 18 is the numerator and 3x2 is a product. It is also clear that with the order of operations, multiplication and division have priority over addition. So lets say a=18, b=3, and c=2. for 18/3x2, which is how this is written ,that is a/bc. Well a/bc = a/bx1/c, and not (a/b) x c The problem isn't written 18/3 x2, but rather 18 divided by 3x2. What is 3x2? That is clearly a product. The product isn't 18/3, which is 6 x 2. The answer is not 16, but 18/6, as again 3x2 is a product, and that is how this is written out, but 3, plus 4, which equals 7. So I hope you learned something, which includes not mocking people who may have gotten things right (for which I didn't look at John's comment), when you are wrong. So if you think that with that little algebraic proof, and using the order of operations, and evaluating the written expression; That having taken PhD courses in math, and having taught math at universities and a top private school, that I am wrong, and that all of my teachers and professors from high school through graduate school are wrong, and all of the PhD's who wrote the math textbooks that I studied from and taught out of are, wrong, but some person who teaches pre-algebra wrongfully makes a video that calls myself and all of these PhD's and textbooks to be wrong...... Then I would recommend you for membership to the flat earth society.

[@thenetsurferboy]

Answer is 7@@randylazer2894

[@annettegollon239]

Okay, so prove it then!!

[@randylazer2894]

@@annettegollon239 I did, as you apparently lack reading comprehension. I gave you an algebraic proof, of a=18, b=3, and c=2. With this problem 18/3x2 +4, for which 3x2 is clearly a product, and 18 is clearly the numerator, this gives the expression a/bc. a/bc =a/bx1/c, and not (a/b)xc. So read my response, and improve your reading comprehension.

[@FemmeMali]

The answer should be 16 sir 0:44

[@stevejones9905]

My brian is right. Yes, I know I spelled brain wrong. It's funny that way.

[@grahamheath3799]

who's Brian?

[@stevejones9905]

@@grahamheath3799 The little man in my head that is responsible for the math and big brain stuff.

[@mikelcollins9273]

16 no doubt,Any 5th grader should be able to tell you that.

[@lindasapiecha2515]

😊👍👍

[@ocioci9222]

Thisismy answer22

[@janedickinson8144]

And many can do it in their heads..ior would like to learn. Your headings are so negative. How about. You can do this in your head! I can show you.

[@richardgonick931]

One

[@williamkirkconnell7306]

16

[@DeltaSun1969]

7

[@ocioci9222]

22

[@miriamdixon4929]

16

[@annaferrara7403]

16

[@MrTcyoung314]

16

[@Shelly_n_TN]

16

[@darnellseward-my9nb]

16

[@conniea4594]

16

[@doreenleeming4630]

16

[@davidatwork]

16

[@queerstudbroalex]

16

[@stanperambo3472]

16

[@sekharb6651]

16

[@chuckandmax7313]

16

[@fredrickabrown6698]

16

[@freedom8589]

16

[@HelenMontgomery]

7

[@jimdep6542]

14

[@louisbrewer1260]

16

[@kimneill8681]

18

[@kimneill8681]

16 sorry

[@warrenj9777]

7

[@user-ri6rn7ti5h]

16

[@Truth845]

16

[@travionsmith586]

16

[@colleencurrier1586]

16

[@markmcclure5349]

16

[@thenakedtruth0205]

16

[@Charlie-os4gk]

16

[@mikemassey7403]

16