How to Multiply Numbers Lightning Fast like Shakuntala Devi (Mental Maths #4)

In This Video we will learn how to multiply numbers faster in your head using left to right method and various techniques(addition method,subtraction method,factoring method) and also will learn the legendary criss-cross method.
Math Blob Run- play.google.com/store/apps/de...
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Mental Maths 1- • How to Calculate Faste...
Mental Maths 2(addition,subtraction)- • How to Calculate Faste...
Mental Maths 3(memorizing numbers)- • Memorize the first 100...
Mental Maths 5(division)- • How to Calculate Faste...
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#mathOgenius

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I hope You enjoyed :)

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Math

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Ok this is genuinely the best advice for mental multiplication that I’ve ever seen. I do something similar naturally so this method just makes sense and has really helped me. Thank you!

[@mathOgenius]

glad to hear that !

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@@mathOgenius would you tell me about 18 square

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Bruh

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The best video for mental maths

[@jagdishkarande474]

I’m compelled to tell viewers how my son learned the tables after coming home from school. I wrote tables of 1-10.
I told him not to memorize because that would have burdened him but only read it daily.
After a number of days the tables embedded in his mind. Upon asking any 2 digits he would give the correct answer.
I then went from 11 to 20.
At 44 now, he can answer multiplication of any numbers on that table.
The viewers, their kids or grandchildren may benefit and wouldn’t burden or stress themselves. Reading is easier than memorizing. However reading again and again and again automatically gets embedded.

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Same

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Also in front of friend

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You'll take seconds but I could say 1 to 100 square in just a sec! You can ask any random square between 1-100

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@@fezan173 how?

[@fezan173]

@@amlanpanda7619 I just memorized

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You're such a great and patient teacher. Thank you so much for all your hard work and for these videos. As a grown up, I realised I'm pretty awful at Mental Maths. I hated Maths at school. Now I'm brushing up with your help :)

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You have my respect. 🖤🖤

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यह ट्रिक हमको बहुत अच्छा लगा। यह ट्रिक से कितना भी बड़ा संख्या हो उसको आसानी से सॉल्व कर सकते हैं। आपका बहुत-बहुत धन्यवाद हम को इतना अच्छा ट्रिक सिखाने के लिए।

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This is such a nice square calculation, I love it !

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[@mathOgenius]

thanks for appreciating!

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it is helpful for going back to School and for being learning a new way of Learning Basic math

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this is really helpful for me cause I'm getting into harder math thanks man!!

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im watching this at 2:30 in the morning so this is just flying over my head lol. ill probably watch it again tomorrow so my brain can actually process. it looks really cool and like something id understand

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[@colourlessfool5107]

I found out that doing it the school taught way was faster on paper, but in your head, this was faster. Plus we are all used to the school way, cause we have been practicing math that way. If I practiced these methods, I would certainly be faster than a person with a calculator or using the school-taught way. Thank you for your great advice on math, I will continue to strive for my goals. Just started these methods a couple of days ago and I feel like I'm slowly becoming faster. Thank you.

[@catchyname58]

I agree with you, i think slowly i will calculate at decent speed atleast

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Exactly same feeling

[@aclemasultan1794]

Yeah but doing mental math and paper is faster that the school thaught way.

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Thank you so much I learned another way but I just couldn’t do it in my head, but I was easily able to do it with your method. Thank you :)

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It is proud to be know that you are an Indian
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My memorizations 60 years ago are still with me.
I had memorized squares of 2-30 and cubes of 2 to 15.
Some of your and others’ ifeas of multiplication are faster.
e.g. 97 x 93

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I wasn't aware but i was using factoring method for a long time.
I learned this myself doing difficult operations.

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your explanation is very good

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Last crisss cross method i didnt understand😭😭
But u teached op....😄😄😄 best

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taught*

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thanks :) my uploading speed is slow thats why

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[@jimbobago]

Just to show there's so many ways to think through a problem, when I saw 46x42 I saw 44+2 times 44-2 and so I knew it was 44^2 - 2^2. 44 squared is 16x11x11 and there's a nice technique for multiplying by 11 to get to 1936 and then subtract 2^2 to get 1932.

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I was taught the old school way so automatically do it fast and it seems easier for me but with this new method it just makes it a lot faster! Thank you…

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[@YonaTypeHand642]

I have another way to do a square of two digit numbers that start with 1.
For example:-
12×12
So first we are going, to just multiply 2 with 12 which is 24, then we are going to plus 24
12×
Which is 144. This doesn't seems the simplest but it is easier for me.

[@kandanat]

12x13, 2x3=6(unit place)and 12+3=15, so 156 is the answer. If two digit got in unit multiplication, there is a carry over.

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@@kandanat thanks

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thanks !

[@nathandaniel5451]

If you have your squares memorised then 42*46 is 44²-4, which is 1936-4=1932

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why does this get recommended at 2am, and what makes me feel the urge to learn how to multiply when I desperately need to catch some sleep.

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I did this in my head in about 1 minute :)