Multiplication 6: Multiple Digit Numbers

[hoops67daft]

When doing the 99x88 Sum, Why when doing the first 9x8 does he put down the 2 and carry on the 7... I always though you carried on the smallest number and put down the largest.... That's really confusing me ;(

[rcarolingq1]

THANK YOU MAN

[GirlyGirlxx9]

:) Thank You! :)

[MystyrNile]

Weird, it works in 480p on the website. . . .

[nozhope]

Thanks. I'm in the process of teaching my son these ideas, so thanks :)

[Nile1147]

I LOVE THIS GUY IS SO AWSOME

[Nile1147]

@Nile1147 i Agree with you

[ZombieBurner666]

i for got about nothing thanks i know i didnt for get how to times.

[puneetshoker]

thanks sal :)

[gunrunnerjr]

thx sal you saved me from my grandmothers bad math leson!

[mickeymouselover1998]

WOW ur calculater is sooooooooooo cool!=)

[mickeymouselover1998]

Wow u finally answerd! lol i spelled thhat wrong!=)

[simigirl75]

Thanks so much! Very helpful!

[elementoxygen]

Khan, when you say 10 times 2, you should also say 10 times 3. make it simple !

your #1 fun

[Ormaaj]

I should see if this method can be generalized to any radix. It might be faster to do it in hex. ^^

This is kind of backwards of how I multiply in my head.

[khanacademy]

To do it in Hex, you would have to memorize your 16 times tables in hex (and convert to and from decimal to hex). Would take up less space on the paper. Not clear if it would be easier.