How to Multiply Amazingly Fast!!!

This is a very easy way to multiply by 9. Simply use your two hands, palm facing downwards... The little finger on your left hand is now number 1, while the thumb on your left hand is 5 (the other finger's are numbered 2-4). The right hand thumb is number 6, while the right hand pinkie finger is number 10 (the other finger's are numbered 7-9). After watching this video you will always remember how to quickly calculate and multiply by 9 ;-)

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Category:

Howto & Style

Tags:

• Easy Math
• Quick Math
• Math
• Math Trick
• Hand Calculator
• Multiply by 9
• Briandudeathome
• Dudeathome
• Brian Dudeathome
• Math is Fun

[knotwelkum]

Multiplication by 9 is so easy on your head that doing it with your hands is completely useless. I thought you were going to teach how to do 679x953 using hands similar to a soroban.

[briandudeathome]

@knotwelkum sorry you didn't find it useful.. I like it =-)

[jwdentertainmet]

been doing this for years. it is cool.

[briandudeathome]

@jwdentertainmet yup, I think it's cool too.

[Snyltebiter]

it's really not hard to do in the head

for example 9 x 13 equals 130-13

117

9 x 45

450-450=405

[briandudeathome]

@Snyltebiter interesting =-)

[818Troublez]

5 x 5 ?????????

[Snyltebiter]

@salman3910

i know. didn't notice it

[salman39100]

@Snyltebiter should be 45 at the last line

[TheJessica0990]

Nice hands lol

[n0000dy123]

ok what about 5*5