Fast Math | Vedic Mental Math tricks - Multiplication 03 | Don't Memorise

For instance, if the base is 1000, then you can find the product of numbers like 1002 and 1003 in less than 5 seconds using this fast math trick.

In this video, we will learn:
0:00 Multiplying numbers just below the base (100)
0:32 Multiplying numbers just above the base (10)
1:42 Multiplying numbers just above the base (100)

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[InfinityLearn_NEET]

Trick to multiply any number by 99
1. Multiply the number by 100
2. Subtract original number
For example - 59*99
1. 56*100=5600
2. 5600-56=5544

[deepdive]

If it's a number like 19*15 the easiest thing to do is multiply 15 by 20=300 and subtract 15.

For like 16*18 you can do 16*20=360 and then subtract 32 or 16*2.
Or if numbers like 13*21 you can do 20*13=260 plus 13 which equals 273.

[izmejersey]

this is more easy than the technique that our prof in mental math taught AMAZING SUPERB!

[tareqnaseri]

But what if the numbers aren't close to the same Base

[prayushdawda]

awesome! could please make videos on topics such as differentiation and integration? That'd be really helpful.

[ArnavSingh-cfjd]

@don't memorise
We all like your teaching method.
U guys r really awesome.

[rogomojo]

Oh by Newtons beard why was I not taught this in school!

[varunbhat]

This is very helpful...You people are doing a great job...

[tanishkanagar]

It would be awesome if you add additional problems at the end :)

[b.a.t]

i understood maths is fun through your videos.thanks a lot

[ranjanadissanayaka]

you are just a life saver...you have given me a massive confidence boost....Thank you soo much.😀

[rameezhussain]

What about multiplying 2 numbers thts not close to 10/100/1000, like 234×311 ???

[babeenconstraction]

These all techniques are originated from India. Our India is the best country in the world

[heershah]

excellent technique thank u soo much don't memorize team!

[rishabhdubey]

What if it's 9× 99 ?
9 is close to 10 and 99 is close to 100?
What base should we take?

[Wiiz_EpiGomic]

Good thing this exist, why? Cause when my math teacher teach is always covering the board till the end of the lesson, so all I see is problems that had been solved but mixed with other problems

[Blogga-Doer]

Hello, Don't memorize.
last time in maths olimpiad. There was a question in junior category.
the question :
How many 6s are there in 30!
(! = factorial)
yet, i have answer the question but I am still not sure.
IT WOULD REALLY APPRECIATE IF U MAKE A VIDEO ON IT😊

[sanjaykumarparida]

19 is closer to 20 not 10 how can we do that

[letsnacho]

That's helpful. Can you make videos about algebraic expressions solving in easy and simple manner.

[kanishka]

How to find the product for numbers like 150 or 1500.