I dont understand why this guy didnt explain this. Helped a lot

How do you combine 128 and 5672?

@@sozukuKrtzLNK he first add the 67 and 28 then the remaining 1 is add to 5 which makes it 6 95 2

THANK YOU FOR THIS. Not quite the way the video explains it. I was multiplying 29 × 47 and the video method wasn't working. This method works. Thanks!

Yes!! Thank you! I literally just asked this question … then saw your post. 😆 Thank you!

Born and raised in the United States 🇺🇸 i love my country. But im 56 and now learning a way better a quicker way from you has left me like WTF! When it comes to our educational system. And very grateful and appreciative to you sir. Thank you very much

@Otto von Bismarck not funny, try again

good all you need to know is that the earth is flat

Right but as long as you have scratch paper is all that matters we all put our jeans on,one leg at a time .. if you can do it with no calculator you are the bomb..lol

School system was always nothing in the first place

Same

Hahhahahaha same bro

LOL

bro im a sophomore in college and just learned this

Studying for my GED 😔

same

Agree I am an accountant an learning this now. 🙏🏽

@@apriltwenty4945 Do you like accounting?

Thank you from Florida

I agree

+Jtheviper Cool!

Jtheviper me to

Jtheviper my teacher called me to go and solve the question at the white board and the class looked at me like "ugh it's this bitches turn" (litter ly) you guys get that pun?(it's pretty bad what am I doing XD)

Turbulent

Is to fast ta simple multiplication nal hi ho janda hai

🤣🤣 same I'm like wtf was my teachers even teaching me

Same

Me too. Love your profile pic.

Me too😂

seriously?? last time im in school was 4 years ago now im 17 and im suprised

MiguelGaming ReadyChannel lol

Wow this was made in the year i was 1 and i am 9 right now wowwww this is old and yes it helps🙂

i keep getting that AD

Ulol

Some of the lessons still helping from 2000 B.C.

Jose' Gonzalez, thank you for explaining. I am coping your answer to the people who have disagrees.

You mean if you have 2 digits from the products of the ones places

For example: 25x25 2x2=4 and 5x5=25 We have 2 digits in this product so don't use the _ 425 (2x5)+(5x2)=20 425 20 625 The answer is 625. If you used the _ it would look like this 2x2=4 and 5x5=25 4_25 (2x5)+(5x2)=20 4_25 20 6025 There would be an extra digit which we don't want.

@@mariafe7050 how would you solve 57 x 17?

@@Theismadsen. I figured it out if you get a double number on the last part of the number use that first digit to add to the middle.

If you want to multiply two numbers between 9 and 100 with this method you have to know that what means if the number is on the first or the second place (and etc.) in the ten numerical systems. For example: 12 X 34 equal / can be written as (10 x 1 + 2) X (10x3 + 4), or generally (10a + b) X (10c + d). Let us multiply these numbers: (10 x 1 + 2) X (10x3 + 4) it will be (10x1X10x3)+(10x1X4)+(2X10x3)+(2X4), or generally (10a + b) X (10c + d) = 10aX10c + ( bX10c + 10aXd) + bd. …. as _X 100 + _X 10 + ... _X 1 The result has a part as 100's from the 10aX10c, has two parts as 10's from the bX10c plus the 10aXd (as sum of cross-multiples) and has one as 1's from the bXd values. The result will be 3 or 4 digits only. I hope that this helps.

It makes use of basic algebra if a x b = c is the question and a and b are any 2 digit numbers. Then a = the sum of it's parts eg 10s + 1s. Eg if a = 25 it is the same as (20+5) In algebra if (d+e)×(f+g) = df+ef+eg+ef Eg 24×53 = (20+4)×(50+3) =20×50 + 4×50 + 3×20 + 4×3 Notice 20×50 is the first part you put down ie the biggest number. 1000. But in order to make addition easier you leave the last 2 units blank therefore 10_ _. Add in the units 3x4=12. And you get 1012. But you still need to add 20x3 and 50x4=60 and 200 or 260. Lose the zero and you have 26_. Line them up. 10_ _ 26_ 12 1272. That's what you do to prove it. But you take shortcuts in your head to get to the answer. Condensing and compressing it to be easy to understand.

Hi!, I know it's a late response but anyway. The reason it works its because it's an application of the distributive law. So for example 22x32 it's the same as (20+2) x (30+2). He is using it out in a summarized way.

Bro what about 46 into 59

@@Doc_Bavarius Not sure if you can edit your otherwise excellent comment but I think you'll find (d+e)×(f+g) = df+ef+dg+eg

Ok.

Lol me too 😂

No one ever taught me this in school. Love your videos.

@@carolynroberson8407 I wish I knew this. I was terrible at math. lol

Nope he is the worst teacher

cool

Bruh I solve it in 5 seconds using normal method

@@AIBuoy134 Good for you, but this is for people who can’t mentally calculate fast

@Adib Farhan 480000

chiaroschurros it’s index, not multiplication. multiplication sign is *

So did you passed?

I used to leave my math exam paper blank. I could not understand a thing.

@@djamilac9556 lol

+Pratima Mehta Congrats!

Interesting but how do you get a 97.7?

+ZingZang Oliver I had a 103% called extra credit and paying attention

+Doom Patato Oh, i was just a little confused because in my school we dont do extra credit.

How did u get a 99.7? My teacher saids it's impossible to get a 99

Because they want you to struggle and get headaches.

@@bustergundo516 ikr

I don't know what you have learned in school to solve this - but I have learned a way which is equally fast and which you can easily transfer to numbers with 3 or more digits... By the way: doesn't everybody use a calculator to solve this?

@@chglubb booo

@@chglubb well you have a nice school ig cause almost every school doesent teach this

What happens when the units part of the answer is 10 or over? Lets say it’s 12 . Do you write down 2 in the units and then add the 1 to the tens column?

@@bambispoon4305 what?

L+ratio+thumbs+nothumbs+nomilk+toomuchbananas+Quadraticformula+bingbong+bin7gchilling+bing

😊😊

I liked and subbed

bing bong

Lol

Well, taking 26 x 86 as an example, the first stage of the calculation, (6 x 6) yields a result of 36. So, instead of a '_6' as shown in this video, you would have a '36' there instead. The next stage, (2 x 8) yields '16' giving us an intermediate result of '1636', right? In stage 3, ((2 x 6) + (6 x 8)) yields a value of '60; add that into the '1636' as demonstrated in this video and you are left with '2236' and the correct answer. :)

@@undercoveragent9889 try 94 x 36. It gives a wrong answer

@@twesiimemaurice8846 yea this track doesn’t work there’s actually a lot of answers that don’t work with the equation.

How is it wrong?

"it's" BIG BRAIN time

ya u r right

ikr

the

the yu y6

6

Yeah, I use the same technique.

It's doesn't work with 24*21

@@olatundeakindeleroberts5369 it does

@@olatundeakindeleroberts5369 504

9

Which job requires mental multiplication a lot

thanks so much for this bro

25*45 pls do this using the above method

Peps Haven - What was the trick? I tried 83X24 and did not come up with the right answer.

@@blenderanim8or It's a little hard to explain but 15 x 33 works out to 15 _ 27 at first step. Second step it's 15 + 27 = 42. Third step is where you have to add. So...first number is 1, Second number is 5 + 4 (from the 42) making 9. Third number is 2 (plus the 2 from the 27) making 4. Fourth number is 7. Full number is 1947. In this video, he doesn't talk about adding carry over's at all. See if this makes it easier. 83 x 24 First step 8 x 2 = 16 3 * 4 = 12 16 ___ 12 Second step 8 x 4 = 32 3 x 2 = 6 32 + 6 = 38 Third step - where you add carry overs. Start with 1 6 __(38)__ 1 2 First digit 1 Second digit 6 + 3 (carried over from the 38) = 9 Third digit 8 + 1 (carried over from the 12) = 9 Fourth digit 2 Total: 1992

Peps Haven That helped a lot! Thank you, I knew there was something I was missing there. And thank you for being gracious and not snarky like so many on this.

@@blenderanim8or You're welcome. It took me a while to figure out what I was doing wrong too until I twigged. :)

@@pepshaven6520 thanks so much, i will mention u here

Hahahah

Facts

But they couldn’t, because they were ignorant

The problem is they come up with a certain way of showing work. And you’re forced to do it their way. It’s not about the correct answer, it’s about following rules. Then later in life you have to teach yourself to work smarter.

18_73 then 75 Now, 187563 Then,18+7 5+6 Then, 25 and 11 Then, 25113 Then, 25carry1 and 13 Then add carry 1 of 11 to the 5 and the answer is 6 2613 That's how I figure it out correct me if I'm wrong thanks

67×39 6×3=18 7×9=63 Put together 1863 Multiply alternate numbers 6×9=54 3×7=21 add them 54+21=75 Take these 1863 add this number 75 starting before last digit 186+75= 261 then write as this 2613

hmm not needed to write such a long comment just bla bla i just warn u not to give once morelike that

Neetu Nagula Long comments are needed to explain important things.

😈🙅

Marachenka Ok great method So when I do 472 x 38, 72 x 38 = 2,736, now use 38 with 3,800, but do that 4 times Or either just multiply it = 15,200 Do adding so 2,736 + 15,200 = 17,736 Answer would be 17,736 Ok is is good but I saw the other video about that first

thanks marachenka it's a good method

Does it matter if AC is > or < 10?

The last 2 calculations should be multiplyed by 10 before they are added.

A= 1824 B= A10 A+B= 20064 =C What is C?

Just modify it bruh and u carry FIRST thing you carry U trying to look smart but you aint And mpdifiy it on your own if you don't like his

@@salumtummundi9462 9x6 = 54

@@superjojo555 oh yeah

97*63 9*6= 54 7*3 =21 Therefore its 54_21 But we only write the One and keep the two to add it later on there fore it would be like so. 54_1 (The 2 in 21 , Since it's tens will add it later on) 9x3=27 7*6=42 27 + 42 = 69 So, 5 4 _ 1 2 6 9 Equal 6111

I'd say just first do it with the 27*23 and later multiply 23 with 100 and add it up.

tivmego It's difficult to explain this method of his in words or maths, but I'll give it a try. Suppose that XY is a number (eg for X=2, Y=3 this number will be 23) and WZP is another number (eg for W=1, Z=2, P=7 this number will be 127) So X,Y,W,Z,P are just digits. Now take and write: (XY) * (WZP) = (X0+Y) * (WZ0 + P) = (WZ*X) [00] + (X*P +WZ * Y)[0] + P*Y where I put the zeroes in [ ] because what he does is write for each zero-brackets an empty slot: _ _ _ in the 1st slot he puts the number next to [00] : WZ *X (the first numbers of your choice) in the 2nd slot he puts the number next to [0] : X*P + WZ *Y (the crossings) In the 3rd slot he puts the numbers without zeros (the two last digits multiplication). That's his idea... and it is not based in separating the number into the 1st and the 2nd digit, but separating the last digit from the rest of your number. So let's go to your example: 127 x 23 = (12 x 2 ) [00] + (2 x 7 + 3 x 12) [0] + (3 x 7) now I will write the numbers in the slots , for that I'll use the bracket for the slots: [ 12 x 2 ] [ 2 x 7 + 3 x 12 ] [ 3 x 7 ] [24] [ 50 ] [21] Now the 3rd slot is larger than 10, so the 2 is going to be added to the middle slot: [24] [52] [1] The middle slot is larger than 10, so the 5 will be added to the 1st slot: [29][2][1] the answer is so: 2921

tivmego You could use his 3-digit trick and make 23 become 023.

or use the lattice multiplication trick.

tivmego

Qiqi Zhang great job!

wut??

you have a mistake here your solve is incorrect, you said put the 49 under the 94 in the middle but the number 49 is not correct should be the 98 because (49+49=98) . thank you

77*77 = 49 98 49 = 59 2 9