How to Calculate Faster than a Calculator - Mental Math #1

[@Griec_e]

This is what should be taught in schools. Like this actually makes sense

[@Rohan-sj8kn]

LoL, Not really special.. He just made a logical trick unsing traditional methods for some specific No only.

[@ghsbadgerfgb8953]

They don't want you to learn easy tricks, they want you to struggle

[@sapwho]

@@ghsbadgerfgb8953 if you’re struggling with arithmetic, school is not the problem 💀

[@sadia8174]

@@Rohan-sj8kn But still it serves the purpose of doing math mentally and FAST at that

[@alxn3806]

Vedic maths already teches these.​@@sadia8174

[@kNoopers]

another funny trick is - every 2 digit number times 101 gives this 2digit twice: 45 x 101 = 4545, 92 x 101 = 9292, 21 x 101 = 2121

[@manzisb]

Awesome. Thanks. Jesus loves you by the way

[@ExzaktVid]

Any 2 digit x 100 will just add two zeros, so when you multiply it by on more you add that 2 digit one more time to make that.

[@ingcrafter]

@@manzisb unnecessary

[@littlestar4332]

@@ExzaktVidThis also applies to any digits as long as they multiplied by 10,100,1000,10000,etc!

[@manzisb]

@@ingcrafter Why does it bother you so much you have to comment about it? It's a beautiful message, it's true and it doesn't do any harm. He loves you too, even if you don't believe it

[@richardwilliamson1639]

I wish we had learned Vedic math in our schools in Texas. I understand now why the greatest mathematicians are Indians. I never imagined that math could be fun.

[@shivaprasadmallikarjunaiah3751]

Even being an Indian (and in my 50's) I have the same thought... because for one reason this was not taught to us in our schools and vedic math itself was unknown to us for various reasons. It's only in the last 10-20 years that it is being openly shared and becoming known to common people and only some schools offering coaching beyond regular school have picked up this methodology to help kids achieve for competitive exams or olympiads., but vedic math still remains mostly unknown.

[@RezwanulIslamLabib]

HE IS A BANGLADESHI

[@Tokyo._Nasim]

He isn't an indian, he is Bangladeshi.

[@penguins4935]

So bangladesh was a part of india 75 years ago...

[@Purplesunsetmath]

This is actually really cool! Usually these things on yt shorts are fake and don't work, but this is actually true. Keep up the good work!

[@learn.with.mahbub]

Glad you liked it!

[@zaqgamingstuff]

@@learn.with.mahbubnow I can show off to my friends

[@Nao20244]

I had never watched any video which didn't work.

[@U_dont_know_what_leeknows]

​@@Nao20244 you're getting fooled 😔

[@nicolebear.w.706]

STRAIGHT TO THE POINT!!! I was shocked but thank you so much!!

[@robinischaotic2]

YOU JUST SAVED MY ASS i have a maths exam in a week and i waste so much time typing everything in a calculator and as someone with special needs, i really need my time.

[@learn.with.mahbub]

All the best for your exam! ❤️

[@robinischaotic2]

@@learn.with.mahbub Thank you so much❤

[@1000subscribers.no.videos]

I clicked on this by accident, and now I'm a human calculator. Thank you!

[@A.Singularity]

I was just mindlessly letting my brainrot and then due to my attention span I accidentally clicked on this too, now I have several phds and everybody is after my head after I proved god isn't real using math, Mondays amirite

[@teabattle2009]

29 multiply by 12

[@srprsmthrfckr885]

😆😆😆

[@1000subscribers.no.videos]

@@teabattle2009 348

[@christianquingcong227]

​@@A.SingularityFOOLISHNESS

[@lexisex-i7k]

when a random indian dude teaches you more than your teacher

[@UntitledLegendx]

He is bangladeshi

[@jah_141]

@@UntitledLegendx same thing

[@UntitledLegendx]

@@jah_141 no not same he is indian and he is bangladeshi

[@yawnddn]

real

[@DailyDevotional-ci5nm]

They were all part of Greater India at one point in time, they're the same thing.

[@Ehanray]

finally the one math teacher that teached properly

[@livy4954]

Taught* sorry lol

[@Ehanray]

@@livy4954 it can either be teached or taught, i perfer teached since its much more easier to spell, thanks for the correction though

[@livy4954]

@@Ehanray what, I'm pretty sure theres no word called teached in English, and no problem it wasnt necessary to correct you lol

[@Imsoboredthatyes]

Yeah teached isn't a word the word is taught not teached

[@JoeJD10]

@@EhanrayOtha reached nu onnume illa

[@happygamal4369]

Woow mashaallah Seeing this video is one of the best coincidences of my life

[@bellaadriannarubic]

Another trick with adding any number with 9 is that you add it with 10 first and then subtract it once. For example, 9+17 would be 26 as 10+17 would be 27 but remember that out goal here is to get the sum of 9+17 so the next step here would be to subtract one from our sum which would be 26. Its actual surprising on how Ive met so many people who dont know this trick yet, ive always used it my whole life and is one of the easiest math tricks ever!

[@abandonedchannel]

i felt so smart for noticing this pattern in 2nd grade lol. this helps a lot!!

[@dimmy2043]

@@abandonedchannelI felt smart when I realized 5 is .5 of 10 (half) so I would multiply 5x83 (random number I would make it even 82x5+the five because we just split the 1 and now it’s 820 by 2 and 410+5 415 or now 5x6864 34320

[@Yourlocalabandonmentissuefren]

WHERE WERE YOU WHEN I NEEDED YOU THE MOST. this was so helpful. THANK YOU THANKKKK YOU

[@mathOgenius]

Good work , keep it up !

[@boredyoutubeuser]

Mathematician

[@redwanhasan4332]

So mind blowing video!!🤯 Thanks a lot.

[@MaryGraceSager]

THIS IS SO MIND-BLOWING

[@Ace_R6.0]

Man if you keep doing these vids i just might die out of happiness😅

[@CRnaixx]

I expected this to be much harder, but it was literally a piece of cake 🔥

[@Mirai_Hiki]

97x94=(97x95)-97=(96^2-1^2)-97=9216-1-97=9118. Also, Trick 3 intrigued me, so I extended it! Its general form is definitely harder, but I think it's pretty cool, and especially useful for multiplying two *3*-digit numbers ending in 5. 45x125=? Start with 2x4x12+4+12=96+16=112. Since the result is even, divide by 2 (56), and add a 25 onto the end. 45x125=5625. 95x145=? Start with 2x9x14+9+14=252+23=275. Since the result is odd, subtract 1 (274), divide by 2 (137), and add a 75 onto the end. 95x145=13775. 345x615=? 2x34x61+34+61=4148+95=4243=odd, 4243-1=4242, 4242/2=2121, 345x615=212175.

[@yanren2658]

it's so amazing!

[@lighthousestudio15]

tldr

[@poipoim6930]

Huh😭😭😭😭😭

[@jah_141]

too many numbers , brain malfunctioning

[@sullitmas]

WHATTTTTTTTTTTTT

[@Grichaox]

The best math teacher in my life!

[@chulobombastic]

*IT took me 5 seconds by using my method... You are fast!*

[@tanishasridhar4527]

Thank you sir, I never knew about this, to the point and explained well ❤

[@grumpyolddude439]

94 is 6 shy of 100....100x 97 is 9700, that is 6 97s too many. 9700 - 600 (97 is 3 shy of 100) is 9100. 100 is 3 moree than 97, so we subtracted 3 too many, 6 times., so 6x 3 is 18...9100+18 is 9118

[@stephenremo9200]

11 is a bad example bc you could just add a zero and plus the number... 197x11. 1970 + 197

[@grumpyolddude439]

@@stephenremo9200 neither a bad, nor good example. Just ANOTHER ex of ewhat said above. Realize 11 is just 10+1. So 11*X = 10X + X. Always true.

[@aungphyo3032]

What do u mean shy

[@stephenremo9200]

@@aungphyo3032 In this case it means short

[@aungphyo3032]

@@stephenremo9200 thanks

[@SelvaShri-xt1yi]

Now the most viewed video of your channel is this video. Congratulations dude ❤️

[@didemdiktas7619]

I am gonna share quickly because everybody must see this way👌

[@fluffypariii]

Ohhhh thank you for this! I’m very proud of myself now that I can calculate faster than before! 🎉😂❤

[@N1ghtLEternity]

BRO THAT JUST BLEW MY MIND. THANK YOU SO MUCH FOR MAKIN THESE VIDEOS 🙏🙏

[@behruzteimory6355]

So useful thanks for sharing great information 👍

[@eeeeeeeeeddddd]

Thank you man, actually very helpful and is straight to the point

[@Kratos98-0]

WOw thank you very much for the trick this is actually really helpful and awesome!! u just earned a loyal subscriber!

[@monsterplayz6148]

Amazing! this should be taught in school literally. But unfortunately they wont do this cus it enables students to excel in studies

[@Sf_masterboy]

Seeing a Bangladeshi teacher making these kinds of video feels so good. I am also from Bangladesh

[@hiteshtrivedi3542]

Thanks for showing this technique.

[@SavievaJ-ge5xi]

Thank you! This was really helpful!

[@tyh4180]

Why wouldn't we learn this in school??

[@Mariohenry785]

cuz they dont teach fastly

[@Fxxxry]

"Does the State want you to be intelligent, rich, capable and independent or do you want you to be stupid, dependent and poor?" Trezoitão, Renato. 2024

[@akshitog283]

Because teachers wanna see kids cry in exams

[@Noodupre4]

Because its overpowered and they dont like People who hack in exams.

[@HarpKoupenov]

Because not every student would listen

[@jadduthug2113]

My man just saver my career Sir i have no words thx a lott for this tricks!! ❤

[@UrielCamacho-z6i]

Just memorize all of these Trachtenberg Method rules and you'll be able to multiply all numbers fast asf: Multiplied By: 12: - Double the number and add the neighbor. 11: - Add the neighbor. 10: - Append a zero to the rightmost end of the multiplicand. 9: - First step: On the right-hand subtract from 10. Middle steps: subtract from 9 and add the neighbor. Last step: reduce left-hand digit of multiplicand by 1. 8: - First step: On the right-hand subtract from 10 and double. Middle steps: subtract from 9, double, and add the neighbor. Last step: reduce left-hand digit of multiplicand by 2. 7: - Double the number and add 5 if the number is odd, and add "half" of neighbor. 6: - Add 5 to the number if the number is odd; add nothing if it is even. Add "half" of neighbor (dropping fractions, if any). 5: - Use "half" of neighbor, plus 5 if the number in this turn is odd. 4: - First step: subtract from 10, and add 5 if the number is odd. Middle steps: subtract from 9 and add "half" of neighbor, plus 5 if the number is odd. Last step: take "half" the left-hand of the multiplicand and reduce by 1. 3: - First step: subtract from 10 and double, and add 5 if the number is odd. Middle steps: subtract from 9 and double, add 5 if the number is odd, and add "half" of neighbor. Last step: take "half" the left-hand digit of the multiplicand and reduce by 2. 2: - Double each digit of the multiplicand without using the neighbor at all. Note these terms: Left Hand: The first number of the multiplicand. Right Hand: The last number of the multiplicand. Neighbor: The number on the left of the number you're multiplying. Halfs: When you're taking the half of an odd number just forget the decimals and take the whole number for example [5 = 2, 7 = 3 ] so just P.S. There is always a zero in the left and right hand of the multiplicand just figure out it yourself I can't explain it any further 😂 (sorry for the bad english) SOURCE: The Trachtenberg Speed System Of Basic Mathematics (it's a book)

[@shivaprasadmallikarjunaiah3751]

Seeing this makes me think that we have forgotten or lost a lot of ancient math that used advanced methodologies. Is this method taught in your country (or the country where this originated)? If not, I wonder why has the whole world fallen back to a primitive methodology of doing math? Ofcourse we need to know the fundamental method of calculation, but such advanced methodologies should also be taught in higher classes.

[@UrielCamacho-z6i]

@@shivaprasadmallikarjunaiah3751 The inventor of this method is Jakow Trachtenberg from Zurich, Switzerland, he literally invents this method while spending years in Hitler's concentration camps as a political prisoner.

[@Snowboard420]

I figured out the method for 9s as a child. (works for everything else too) Except the Trachtenberg explanation is awful. xD 9 x 9 , step 1: multiply 9 by 10 = 90 (10, or any number that is divisible by 10) step 2: subtract by non 9 value (if you only have 1 nine) = 81 so if you had 8 x 8 or something else you just do 1 more based on it's difference from 10. step 2: subtract by non 8 value twice, 7 value three times, etc. = 80 - 16 = 64 or 55 x 55 , 55 x 50 = 2750 (5 x 5 = 25 x 10 = 250 + (5 x 5 x 10 x 10 = 2500) = 2750) addition instead of subtraction this time, 55 x 5 = 275 + 2750 = 55 x 55 = 3025 Might be better to just do 55 x 100 = 5500 / 2 (=55 x 50) = 2750, Step 2: plus the remainder, 55 x 5 = 50 x 5 = 250 + 5 x 5 = 275 + 2750 = 3025

[@UrielCamacho-z6i]

@@Snowboard420 The Trachtenberg Method rules I commented on are the simplified version of the rules that came from the book itself. When you read them from the book, the explanation will also show some illustrations and will teach you every detail step by step.

[@srivishnucharan5367]

Loved it Mahbub !! Thanks

[@say_yes_w]

I had found out about the first trick 11 while i was memorising the multiplication. Keep the journey, your video is so impressing.

[@rodamaeozaeta2023]

KZbin recommend this video for me. Thanks I get to know this channel.🏆🏆

[@MelanieMarcelino-j1q]

I was once not smart in math but now i always answer in my class. Thank you!

[@kenhaley4]

Pedantic point (I can't help it): "lightening" means making something lighter. The word you want is "lightning" which refers to an electric bolt from the clouds during a thunderstorm. I don't mean to take anything away from the point of the video, which is great content.

[@learn.with.mahbub]

Oh god! I didn't notice it. 🫣 Take love dear! ❤️

[@berkenkarakas5490]

You got my respect my G

[@leboganglesley2672]

you are really super smart

[@giovComajes]

Best video ever as a fourth grader this is very useful in my class 1:45

[@wrkj.3]

This is just made my math easier. thank you! ♥️

[@MsK_byTheWay]

This is so cool! Thanks for sharing!

[@MsK_byTheWay]

I did not get the shortcut for the last part...6:39. Can you explain one more time?

[@learn.with.mahbub]

Please watch this video - kzbin.info/www/bejne/bX3Zk6qXfptjr6Msi=mR82Ipt9blwVjGNy

[@MsK_byTheWay]

@@learn.with.mahbub Ok, I got it! You are amazing!

[@learn.with.mahbub]

❤️

[@piggowiththelettuce3954]

Even though I knew some of these tricks I learned more details and I really loved the way you explained it. I really love your energy, I don’t know what it is but you seem very genuine and passionate. I think that this will translate into success in the future because you stand out in a great way. Keep up the good work, you earned a new subscriber and I’m sure you’ll earn many more

[@SophieSM-1]

That is actually so helpful! I started fifth grade but I hope I use this often so I don't forget it. 😅

[@IcePhoenix-iz9fj]

amazing thanks for the vidoe

[@xbman1]

They make education more difficult than actual really is. Many reasons why and those reasons are in the best interests for the students.

[@4TheLoveOfHockey]

this is a great video, liked and subbed, I want MORE!

[@learn.with.mahbub]

Will make more videos every month hopefully. please watch other videos as well. Thanks for your words.

[@arleneborres-du7ph]

Thank you sir 😇💪🧠

[@learn.with.mahbub]

❤️❤️

[@shafiradbq]

Terima kasih penjelasannya

[@learn.with.mahbub]

Terima kasih kembali

[@Hadug31]

Amazing and very good !!

[@anonymous........]

Awesome 👍🏻

[@EmbekClips]

This is a very extraordinary video

[@alejandrocospin2025]

How wonderful is math realy

[@xarces001]

thank you so much, Mahbub! I've been wondering how to calculate fast, how coincidental it is that this video appeared on my home page.

[@RealHunk_94]

Why only with 11

[@PritiSingh-tf3fx]

Bro thanku 😊 ..easier

[@BoysWithरोहन]

This help me lots thankyou teacher soo much ♾️💖

[@jayasreesmenon4988]

Super class sir thankyou 🙏🙏🙏

[@Viciously0bcrip]

Yo thanks dude

[@ElzaNagatha]

Okay thank you... This is helpful even though I often forget.

[@caderbavahmuhammadsiddick384]

Thank lots for sharing 👍 💚 ❤️ 💙 😊

[@EazyAlperne-pg5wc]

Brother Mashallah ❤❤❤❤❤❤❤ u r really a masterpiece ....thnks sooo much ....I hope u will give us more and more info. Inshallah ....luv from kashmir brother ❤❤❤❤❤❤

[@learn.with.mahbub]

❤️❤️

[@aybtommy]

thank u sir

[@razexxx5507]

Wow, Thanks really.

[@adan.creations]

ISTG CANT THANKYOU ANY MORE FOR THIS

[@nnofficial2414]

Great job!

[@youssradadou411]

That's really helpful❤

[@quinnlatisha2013]

U made my day🎉🎉

[@cloudproblemssolved]

First one I found that isn’t made up! Great job!

[@nourrrrrr457]

I am so lucky to find this video Thank you very much for your effort

[@AnyanwumeluChristian]

Thanks well done

[@Asiya13-x4u]

Thank you so much sir

[@Nao20244]

Thank you very much ! This is a treasure.

[@KidistKiros-g5f]

It is very Osm😊

[@mohamedgamel3683]

thank you so much😊😊😊😊😊😊😊

[@cannochiAle]

Thanks for the tricks, you have a new subscriber.

[@Sinnchan209]

VERY GOOD WORK BHAI :)

[@k_ali632]

Great job, thanks

[@kierakukuruyuk]

Thank youuuuu man 🔥

[@agostinhojosealexandre5594]

Thank you.

[@shadikbejoy8727]

*Note* Trick 4 doesn't work if 56*59 and other terms this.

[@N0i9h0a9]

Such a great teacher ❤❤

[@STUDYACCONLY]

bro u only teach us to multiply with eleve not other numbers....

[@st4rrzzforimmy]

still helps

[@Axie_thebossbabe]

At least learn one thing!

[@julekhakhanumjolly1982]

Bro we need you hard!!!!!!! Thank you many times! Make more vids about calculating fast please!!!! ❤ Also how to solve algebraic problems, geometry problems fast and easily pls pls!!! That will help a lot for all of us, may Allah bless you😊😊

[@learn.with.mahbub]

In sha Allah, will create new videos on these topics soon!

[@AnimeFun4ever]

Wow thanks 👍

[@Carinochristopher]

Thank you so much for sharing this sir

[@Toxicm569]

Thank you sir ❤

[@giovannianimbono17]

incredible. thanks

[@crisvisx00]

wow that’s really cool you are a great teacher!

[@MaramZire]

thank you very much this is so good I just didn't get the last one

[@learn.with.mahbub]

watch this one: kzbin.info/www/bejne/bX3Zk6qXfptjr6M

[@encantogamer114]

Thanks

[@yuninaparamitha7325]

accidently found this video, i can't thank you enough!

[@Aakash-hk6nc]

funny how i was able to calculate 2 digit numbers with 11 within seconds even before watching this video 😂❤️.

[@Math_Easy6]

Perfect

[@rayrocher6887]

Thanks for, math hero work, better world

[@chikinniechi1928]

I learnt the 95^2 technique at grade 5