Fast Math Trick - How to multiply numbers under twenty faster than a calculator

#fastmathtricks
#mentalmath
#mathtrick The easy way how to multiply numbers under twenty - faster than a calculator!

Vedic Maths is series of mathematical tricks, originating in a book written by an Indian monk Swami Bharati Krishna Tirtha in 1965. It contained a list of mental calculation techniques which were claimed to be retrieved from the Vedas - are a large body of religious texts originating in ancient India.
Please if you are learning this, however, do not treat multiplication as a mere trick. It is important to remember 17 x 13 for example, is the repeated adding of 17, 13 times (17 + 17 + 17 + 17...).
This method is a shortcut, but as the end proof shows, it is using a shuffling of required calculations to make this multiplication more efficient.
For 17 x 13, we have lots of multiplication going on (that is repeated addition!) - 10 x 10 and 3 x 10 and 7 x 10 (lots of 10s - 20 all up) - and 7 x 3.

[gamingtoast]

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[alexandrebertone]

Him: I'll give you 5 seconds
Me: *blinks*
Him: Alright so 5 seconds passed

[angelomarban]

I wish I knew this way... 38 years agooo❗💖❗

[senshiedit]

Bro I just do 14x10=140 and 14x2=28 so 140+28=168 easy

[simeontrewenack]

Thank you - Maths destroyed me as a child, now I'm able to learn through your techniques and have a new appreciation for mathematics. Brilliant work.

[USAVT]

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[adanparamo]

You have a nice and calming voice defenitely I can learn like that thanks.

[hustledude]

16×17, in my head I think OK I’ll double 17 four times. 17×2 = 34, times two again equals 68, times two again equals 136, times two again equals 272. 15x19 is easy, 19x10x1.5 = 190x1.5 = 190+95 = 285. Or I’ll do 15x20 = 300 and then subtract 15 to get 285.

[Fxrgd]

Time to blow my math teacher’s mind :D

[Shamblade]

Me at school:*best at maths*
Me at school after watching these videos: *even better at maths*

[Roy_Malaeb]

Ami the only one who came because his writing is so good

[mudkip]

This is what I do to 14x12
Split the smaller number to make it easier
14x(10 and 2)
14x10=140
14x2=28
Add them together, 168

[charmandos]

This can also be done with numbers over 20.
For example: 36*32

First step (36+2)*3=114
(multiplier depends on the first number [if it is 85 then multiplier will be 8] )

Second step 1140+ (6*2)=1152


Note that first numbers need to be the same (25 29, 36 37, 85 89)

It is quite compicated to be solved in mind but still doable.

[ratskirobo]

Had i known this, i wont be a bum today. Thanks a lot. I subscribed.

[fll]

This helps alot but
Why not just memorize the Multiplication Table so you could do Mental math..

If you wanna learn more advance math
you need to memorize the Table.

[saikyawthanhtay]

Smartass guy at my school: of course u know didn’t u
Me after watching this vid: My region has become

[seemapatilJapan]

could you please simplify the multiplication tables from 21 onwards ?

[juderaymond]

“Two hundred Ninety five”
*writes 285*
Me: 🤯

[nisagin]

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[NiamhCreates]

I discovered your channel a few days ago. Love it. Especially the accent.