4 divided by 8 all over 2 times 4 = ? Many will get this Basic Math problem WRONG!

How to simplify a fraction problem that has multiplication and division in the denominator and numerator - order of operations, pemdas and grouping symbols. Learn more math at TCMathAcademy.....
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[@viwa]

I left school at 15 with only basic knowledge of maths. I find this helpful at extending my maths understanding. Perhaps this channel is not for those who know it all already and find it simple. Thank you, I appreciate your posting.

[@cassbarrow3094]

As a 92 year old, the answer was simple 1/16

[@shortliner68]

Yeah, as a 73 year old I got it right pretty much in my head. I try to work problems in my head or by writing them out if too complex rather than use a calculator. We also taught our kids to work math problems out by hand rather than use calculators, even though their teachers allowed calculator use.

[@khankrum1]

@@shortliner68 Me too. 73 as well

[@KenG557]

70, and got it right 👍

[@arohaodufu7998]

Me 45 and nearly missed it

[@Jenna-ok9wb]

This annoying man made it difficult when, really, it was simple!

[@russelllomando8460]

Got it mentally 1/16. Just easy fractions. Thanks for the fun.

[@RodolfoAballe-fc6lt]

4/8 / 2x 4 =? 4/8 x 8/1 =? 4 x 8 / 8 x 1 =? 32/8 = 4

[@shahdeen4444]

1/16

[@DebbieCossman]

4

[@Cayuyo]

4/8 ÷ 2 × 4 = 1/2 ÷ 8/1 y 1/2 ÷ 8/1 = 1/2 × 1/8 y 1/2 × 1/8 = 1/16 ✓ L.Q.Q.D.

[@krunoslavregvar477]

c) 1/16 As I could say, not exactly problem for "brute force" of calculator itself...

[@nickcanncann7044]

How do make this so long winded?

[@innocentniyokindi6775]

a)1

[@jald910]

1/16 in my head

[@ephraimsender876]

good for y ou

[@jagmd]

In my head. One half of one eighth. EZ peasy

[@kevinmadden1645]

I should hope so.

[@michaelgriffin2741]

I did as well , in about 4 seconds , I leard how in 1963 . I was 10.

[@maxineb9598]

​@@ephraimsender876Whoopty doo!!

[@ritaobrien2779]

I wish my math teachers had taught this way. Will definitely continue to follow your channel.

[@topkatz58]

(4÷8)/(2×4) = 1/2 × 1/8 = 1/16

[@carlosreza4638]

You seem like a good math teacher but I wish you would just get to the point, You talk too much.

[@fenderbenderxaddo5974]

I solved it correctly in my head in 10 seconds then watched until the end and learned something. Thank you. I am not capable of dragging something out like you do though. I learn better fast

[@Me-hd4ke]

haha yup took me like 20 seconds then spotted the video was 19 1/2 minutes long - no choice had to watch what could ever take so long - wow

[@aliciasanchez5441]

My answer is a = 1

[@Ayelmar]

Solved in my head at the thumbnail, my answer is c) 1/16. First, we evaluate both the numerator and the denominator as though they had explicit parentheses. 4/8 = 1 / 2. 2 * 4 = 8. Then, calculate the fraction as a whole, 1/2 / 8 = 1/16.

[@joleneshippy2092]

You go girl! Let’s hear it for math in the good old days! I’m 67 and still love to teach math!

[@tanguerochas]

The problem could also have been expressed as (4x(1/8))/(2x4). Looked at that way you could cancel out the 4 from numerator and denominator, leaving you with (1/8)/2 which is equal to 1/16.

[@davidtuer5825]

How to make a simple sum difficult. You should be a maths teacher!!

[@pamalayewell5155]

I have always been frustrated mathematician. Math, especially algebra, made no sense to me. I love watching your videos and have learned some of the math methods I missed in high school. Thanks.

[@chrisdissanayake6979]

Yes, how nice it is for us to be appreciative of the priceless work done by this teacher!

[@marshabroers6518]

1/16. I REALLY solved it on paper before you gave the answer!! I am 70 and I use your channel to try to keep my brain going strong!! 😁⭐ Thanks, Mr KZbin Math Man!!!

[@jetlee44]

Yes multiple and divided before adding and subtracting

[@DavidFlockhart]

1/16. Simple mental arithmetic he said humbly.

[@ClintonBrownell]

This teacher makes it so complicated. 4 / 8 is 1 / 2 or 1/2 inch. 1/2 inch divided by 8 is 1/16.

[@teenaray8084]

I didn't think you could drag this out nearly as long as you did. You proved me grossly wrong. 🙄

[@rgw5991]

next will be 1 hour video on 1+1

[@MrGearoid65]

😂😂😂😂😂😂😂

[@patrickmannen3637]

1/16

[@katherinechau3833]

You are dragging it too long. I lost interest.

[@kerryannaikman-mclean4191]

I was just saying the same thing.

[@amayastrata4629]

I’m so glad I got it right. Did it by looking at the thumbnail and then went into the video. I’m very impressed with myself. I’m not a confident maths person.

[@errolwalcott9997]

1/2 / 8/1 => 1/2 x 1/8 = 1/16

[@tamTran-pp4kh]

4 : 8=0.5 2x4=8 0.5 : 8 0.5 : 8=2x0.5 : 2x8 =1/16

[@patricksellu5262]

Can also use BODMAS, I.E BRACKET OFF, DIVISION, MULTIPLICATION, ADDITION AND SUBTRACTION. IT IS THE SAME AS PEMDAS. THANKS

[@chuzpah38]

Where's the E (exponential) in BODMAS?

[@montyhall-vs3ul]

How about just thinking about one eighth of one half Geez.......

[@nyneeveanya8861]

Parentheses. Numerator in parentheses divided by denominator in parentheses so (4\8)/(2x4) which is 0.5/8=1/16

[@RushanGamer000]

1/16 is the right answer.

[@duncanenyodi6222]

Simple way to work it out is (4/8 )÷(2×4) = (4/8)÷(8/1) =4/8 × 1/8 = 1/16

[@mikeransom1168]

So, written as a line, it goes: {(4/8)/(2x4)} =1/16. This way you don't have to assume the order of operations, just follow P.E.M.D.A.S. left to right paying attention to P. and the fraction bar defines its own order.

[@jeffallsbrook3999]

Some people do make that mistake of the. Order of the problem, especially division. The 4 is before the 8 which makes it 0.5. Not 8 / 4 which equals 2. which is really easy to get the one in a quarter answer.

[@brendenramsey3989]

Whoop whoop math nerds unite! Who else was able to finish this one in their head?

[@sameebah]

My 6 year old niece, for one.

[@jamiesargent1318]

I’m confused as to how you get 1 or 4.

[@joebriggs8422]

Got 1/16 quickly in my head. Skipped to the end and agreement on 1/16. I don't know what I've skipped possibly learning, but I'm moving on to spend the saved 19 minutes on other activities.

[@nicholasb8900]

I just fast forward to the stuff I don’t know. Also, these videos are designed to be stand alone videos so every video will contain all the information you need to solve the type of problem presented.

[@Poult100]

😂 I love the way you presented the answer! When you put '1' up, I thought, Damn, he's right; I am surprised! The you said it was the wrong answer. Phew! I got it right 😅

[@adelemouakad3572]

As an 80 year old I got 1/16 without a calculator!

[@zgh46840]

Didn’t need a calculator. Did it in my head.

[@barbs1298]

Me too!

[@DonaldBrown-w9y]

1

[@AM-er5vx]

C=1/16 : Caclulation: 4/8 =0.5; 0.5/(2x4) = 0.5/8 =0.0625 = 1/16

[@terry_willis]

This is more of a semantic problem than a math problem. The PEMDAS rule needs to be modified to reflect the vinculum (horizontal dividing line).

[@MrSummitville]

Vinculum?

[@gavindeane3670]

PEMDAS has already been modified for exactly that. Another version of the acronym is GEMDAS with G for Groupings, which acknowledges that there are other grouping symbols in mathematics besides just parentheses.

[@terry_willis]

@@MrSummitville You're right. I misspelled it. Correction made. No smiley face for me. :((

[@markwhiting3614]

Don't forget roots with exponents

[@MrSummitville]

@@terry_willis Still that was some esoteric stuff!👍⭐

[@montyhall-vs3ul]

First mistake is to start thinking about a calculator, instead of just thinking of the problem

[@maintenancebynathan2150]

I'm quite certain this entire video could be expressed in 1/16 of the time!

[@stuartb3609]

Got it from the thumbnail. Basic maths from school in the 70s must have sunk in after all.

[@otisbailey5455]

Good refresher.

[@sophie9843]

Why did it take you 20 minutes to figure it out? It took me 10 seconds to do it mentally.

[@jamesmcclure5947]

10 seconds? It took me 2 seconds. 20 minutes - duh!

[@chrisdissanayake6979]

Congratulations! According to your comment, you are extraordinarily smart in Math, right! However, it is so sad that before you developed brains for Mathematics, you haven’t acquired the basic wholesome human qualities for you to be able to live with the other fellow-beings in harmony. Before doing Mathematics or whatever, we should be wise enough to have compassion, empathy, generosity, etc., towards others. So, please don’t be impatient and brag about your ability to do in 10 seconds. This teacher is teaching to the majority of normal people like us.

[@sophie9843]

​@@chrisdissanayake6979 the majority of normal people like you (and me too since this is 3rd grade math) would have understood it much faster and easier if it was taught the easy and simple way. No need for needless verbose and confusing methods. People who use these techniques try to impress us because they don't impress their own selves.

[@chrisdissanayake6979]

@@sophie9843 Who are we to criticize the teacher ? It is like going into his house and demanding him to do things the way we want. That is rude. He has his freedom to teach in his own teaching style. If we do not like the way he teaches, we better start our own channel and teach in our way.

[@sophie9843]

@@chrisdissanayake6979 who are WE to criticize the teacher? We are the people who should question anyone and anything, especially those who cultivate our minds and/or shape up our future. There is a special word for those who do not question anything that comes from a higher ranking whatever that ranking may be (academia, political, medical, social, ...) and the word is: herd. This teacher decided to go from NY to NJ via Washington State. It is fine for those who like long trips. It is also fine for someone else to point out that there is a much shorter way, via GW bridge.

[@LimeLiquide]

i tried to say 4 😂

[@lilianajankovic6426]

😮😮

[@charlesmitchell5841]

D) 4

[@jamescoe4765]

I was too old to be taught the new math game called PEMDAS. I just converted the problem to fractions and got the answer. I think the purpose of PEMDAS is to teach young people how to use calculators and not use their minds.

[@ThomasVWorm]

PEMDAS is only the order of operations. Even when calculating with fractions, you need to know the order. Also when converting a problem to fractions. The only thing, they did not teach you was the name PEMDAS.

[@Stylux-z1p]

[4/8] / [2 * 4] = [{4/8}/2} * 4] = [{1/2}/2} * 4] = [{1/2 * 1/2} * 4] = [1/4 * 4] = 1 ---> ANS

[@renguyen81321]

4 chia 8=1:4 2x4=8 8= 8:1 1:4 chia8:1 bằng: 1:4 nhân 1:8 bằng (Phân số chia phân số bằng nhân phân số đảo ngược) 1:4x8:1=8:4 =2

[@renguyen81321]

1:4x1:8=1:32

[@creativeandaliveat65]

Finnish school system 50 years ago - no-one would fail at this one.

[@dddaaa6965]

Yeah well teachers suck now, and they have the GALL to complain about not getting paid, I sit in class and barely learn anything plus the teacher gets mad if you don't understand their convoluted explanation but I spend 5 minutes on KZbin and learn multiple days worth of lessons, it's absolutely pathetic, I've only ever had one good teacher that doesn't sigh and whine when someone asks them a question AND EVERYONE DID GOOD IN HER CLASS PLUS SHE HAD BIG BOOBS, I can't even be bothered to ask teachers anything anymore because there is a 50/50 chance of it turning into a huge ordeal for no reason whatsoever.

[@susanstanford6881]

The answer is 4.

[@IrisAnnButler]

O.K. youngins, I got it wrong. Not everyone is good at math, but I had brainiacks tohang around with in school. This refreshed my memory. I like the simple way to explain, and let the one who got it wrong not to feel bad. I have subscribed to this because I want to keep learning. Thank you for being yourselves, I love math nerds as you call yourself. Math people get great jobs.😁😁😎😎

[@ngozikanu4184]

Please can you explain divided before multiplication, because from left to right on P.E.M.D.A.S multiplication comes first

[@errolwalcott9997]

1/2 x 1/8 = 1/16

[@mankosi9061]

Your example of 10 div 2x5 I get 1 instead of 25. According to PEMDAS... multiplication first before division!

[@jimerrigo7142]

i love this, brings back those schools days

[@loridavid5463]

1/16. Divide 1/2 into 8 parts

[@jamesguitar7384]

This is not maths , or math as the say in America. It's arithmetic and quite straightforward mental arithmetic. Maybe they do different subjects in schools nowadays . To solve this is past times would be no great achievement.

[@woofwoofaskapup]

Is PEMDAS local to your area or new? I always learned math with BEDMAS (Brackets, Exponents, Division, Multiplication, Addition, Subtraction) I only heard PEMDAS in the last year or two long after I finished school maths. Some channels here equate the two and mention both, other just BEDMAS but your channel is unique with just this PEMDAS. It begs the question is this a local thing?

[@lalleevj9639]

As I am 70 I did it mentally and get immediately this ans. 1/16. . Iam proud of myself.

[@ephraimsender876]

4 Divided by 8 = to 4 times 1/8 divide the cross product by 4 = 4.1/2 =2 mutiplied by 1 2divided by 8 = 2.1/8 final result =1/16 sorry if you can't read it the right way.. MY WIFR DOING THIS MATH IS cerebral palsy

[@reddappaogeti5152]

4/8 -------- =0.5 / 8 =5/80= 1/16 2 x 4

[@SmartAlec86]

Admittedly, I did get the answer wrong the first time (when I was just looking at the thumbnail) because my brain interpreted 4/8 the wrong way, which I assume is why most people get this wrong. I originally thought 4/8=2. But then I corrected myself, getting 4/8=0.5. And then 2*4=8. That's 0.5/8, or 1/16. So the answer is C. I also don't know how to put it into a calculator to get a wrong answer. [EDIT] Okay, I see how people would get it wrong. They would forget the use of parentheses.

[@bethderrico5259]

Omg! I got it right and I SUCK at algebra! Not feeling so dumb now. Maybe I’ll pass my exam next week🤷🏻‍♀️

[@johnmartin2813]

Actually the correct answer isn't given: it's 1/2! 4 divided by 8 is 1/2. 8 divided by 8 is 1. 1/2 divided by 1 is 1/2. (It's in order to avoid this sort of error that brackets are commonly used in mathematical computations.)

[@MerryDrums]

4/8=1/2, 1/2 divided by 8=8/2=4, therefore answer is, d)=4

[@VanceGibson-FUcia]

A) 1 is the right answer, I think. I reduced 4/2 to 2/1 and 8/4 to 2/1, so 2÷2/1×1=1/1=1

[@MerryDrums]

Oops! I should have checked my working before I pressed 'send'. What a silly slip! Answer is obviously c) 1/16 I'd divided by 1/8. WHAT A GOOSE!

[@DocWpunkt]

It’s simple. "Two fractions are divided by multiplying with the reciprocal." 1/2 x 1/8 = 1/16

[@drbonesshow1]

Many are chosen, but few succeed. Too bad. Well, I'm a physics professor so 1/16 was the answer for me.

[@tomboedeker8479]

I hate it when people present these questions as an order of operations question. The right way to think about this problem is that 4 divided by eight equals 4 times 1/8. Once everything is translared into multiplication then the problem is simple: since everything is multiplication the order doesn't actually matter as long as you multiply the fractions correctly.

[@BabalwaMusekwa-bm8oq]

4 goes into 8 two times = 2 and 2 x 4 = 8 2/8 =1/16

[@drifty2u]

60 years ago we didn't add parenthesis.

[@BanksfMax]

I tried marking out the 4’s at first. As you were explaining it came back of changing the fraction division to multiplication.

[@BrandurDavidsen-wd2lp]

4/8/2 x4 = 1/2/8 1/2 x 1/8 = 1/16

[@panzerabwerkanone]

c: 1/16 I just treated the numerator and denominator as if they were in parenthesis.

[@jimsavely1104]

Just in my head and was easy. Math was the only subject I was good at in school 50 years ago

[@melaniekendall4903]

It's Maths!! When do you hear anyone saying mathematic? It's mathematics

[@manuelquitevis6794]

.5 : 8 = 0.0625 and 1/16 = 0.0625(c)

[@luillierstephane1463]

C) 1/16. 20 seconds just mentally.

[@Shay-q8u]

4 * 1/8 * 1/8 4 * 1/64 4/64 == 1/16

[@Sunny.6305]

4/(2×4×8) 1/(2×8) 1/16

[@charlysteenstevens9314]

I wish that you'd start by doing the problem correctly and then explain why. You use way too many words and instead of clarifying things that makes it more obscure, and much harder to remember the correct way.

[@thomasharding1838]

The calculator here in my MAC has parentheses function. And fortunately, I understand how to use them.

[@stevethompson8504]

Im going with c 1/16 before i start the video .i did work it out from the math but then checked back on my self with fractions i would use more often in life so i arrived at the piont of saying ok so .5divided between 8 and doubled it to 1divided by 8 which is 1/8th sp. So yes half of that must be 1/16th.

[@USA848]

I decide 4/8 =1/2 1/2/8/1= 1/2x1/8= 1/16

[@richardjacobson3049]

Well if I type this in to my ti exactly this way (4/8)/(2*4), you get 1/16, you can also do that in your head.

[@MimiDidi121]

1/6 with no calculator. Some calculators may do this correctly! It doesn’t really make sense that order of operations has much to do about it because multiplication and division is the same.

[@petersearls4443]

I think you meant 1/16.

[@patty4709]

I’m 85 and knew it was 1/16

[@kermitefrog64]

😊 Could this be looked at as 1/2 ÷ 8/1=1/2×1/8=1/16

[@DV-id6di]

1/16 just don’t forget to multiply the reciprocal of 8❤

[@janwilliams3058]

The answer is 1/16th. Basic math.

[@rovnguyen1378]

THANK! GREAT TEACHER!!!

[@bryanwalker6125]

Please replace your commentary with another that does not use repetitions of "kind of".. However, I liked your explanation and have subscribed! Thank you.

[@glcglc123]

HP 15C, 4 enter 8 divide, 2 enter 4 times, divide easy peasy, thanks for the fun

[@GravyDaveyW]

I would love to hear this explanation in about 4 minutes 🤷‍♂️

[@mitchbogart8094]

1/16th right? Long horizontal fraction bar means implied parentheses around the numerator and also around the denominator. (1/2) / (8) = 1/16th

[@rogersepeda]

What I did was real simple : First I solved for 4 ➗8 🟰.5 Second : multiplied 2*4 🟰 8 Third: I multiplied both the denominator and numerator by 2 and I got 1/16

[@hisanosukedyer]

If P.E.M.D.A.S is as you have explained, then what is B.O.D.M.A.S and what is the difference between the two?

[@zeenatdurrani8607]

4 div by 8 is half......or 1/2.....1/2 div by the denominator of 2x4 = 8 so now the solution is 1/2 div by 8 = 1/16....very easy isn't it....IT IS NOT 1/2 OF.......... BUT 1/2 DIVIDED..... BY 8...SO ITS OBVIOUS THE ANSWER IS ,,,1/16

[@RodolfoAballe-fc6lt]

4/8 / 2 x 4 =? 1/2 x 1/8 =? 1 x 1 / 8 x 2 =? 1/16 = 1/16

[@johnnyragadoo2414]

Ooh, ooh, I got this without algebra - the problem is a fraction over a fraction - 4/8 over 8/1. Simplify that by multiplying the top denominator by the bottom numerator, leaving a one in the bottom numerator's position - 4/64 over 1/1, or just 4 over 64. 1/16! If the problem were, say, 5/8 over 16/2, then leap-frog the bottom denominator to the top numerator by multiplying, leaving a one in the bottom denominator - that gets you to 10/8 over 16/1. Multiply the top denominator by the bottom numerator for 10/128 over 1/1, or just 10/128, which is 5/64. In other words, (a/b)/(c/d) equals ad/bc. Dividing the denominator as the same effect as multiplying the numerator. Dividing the numerator is the same as multiplying the denominator. It's not algebra, it's just visual leap-frog up from the bottom. No need to question anything other than to note the wise logician never divides by zero.

[@LJLMETAL]

I was able to figure it out in a few seconds just by looking at it. The correct answer is 1/16

[@errolwalcott9997]

C = 1/16