How to Calculate Fast! - Fast Math Calculation Trick
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- Опубліковано 2 лип 2024
- This math multiplication trick is easy to do, and can be used to directly multiply large numbers! Math is easy with the tecmath math method of multiplication (say that five times fast!)
Playlist: • How to Multiply Instan...
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Multiply Fast playlist ua-cam.com/play/PLjbxBzUM6SLmzIG-wy_rKYZYNHdfg9V7P.html&si=YxK_LLi5T7xq3SWa
How are you all tonight?
Hiii
Well, 👍🏻
Keeping well thank you.
Good to hear
I’m good!
Thank you Josh, it is a delight to have an arithmetic refresher often.
It is rather. I must say I square and multiply numbers in my head as meditation. But I am rather odd.
@@tecmath Thank you for you kind reply Josh. You have chosen a form of meditation that would be a delight to teach and keep dyscalculia and innumeraxcy away. Never consider youself rather odd. It is better to meditate by squaring and multiplying numbers than sitting in front of the television and taking in useless superficially and fake news.
Hats off to you! You bring out the mathematician in everyone!💯
Thank you for that.
This is amazing!! Cheers from 🇨🇦
Right back atcha from 🇦🇺
Thank you so much! This is super helpful.
Excellent trick but it would be great if you could make a playlist just for quick multiplication so that we can access them easily before exams.
Thx this helped me alot
Thanks
it works ☺️ helps so much
It does! And thanks for the comment.
You are the best kind of people tye earth creates
Great video
Thank you
Trick number 1 for fast calculation. How did you go with it?
This is tricky. The FOIL method is all I know how to mentally do.
I have to watch this ride quite a few times. My way of doing multiplication
is something like this (10 + 2)(10 + 2), which is 12 times 12 = 100 + 20 + 20 +4
which now = 144. Yeah, FOIL is easy, but this little trick or tricks you do are
not so easy. lol Great Wonder Josh. I could only wish I knew math like this.
Perfect.
Genius!
more ways i can multiply this quickly for numbers thst dont meet these specific criteria? Great! I will highly appreciate these vids as Multiplication and basic arithmetic is my weak point tbh
Your videos super
Which tab your use in writing
do you know this one?
no :o
@@spyroluver0951 We are encouraged to be numerate.
Yes, I used base 100 for the thumbnail before viewing.
I already did!
Is this for evry number
What about 86×49??? I really need help figuring this out
How old are you sir? It's impressive to see you still uploading videos
Just turned 50 last week.
And a little secret... Just found out I'm having another kid!
Keep that between me and you.
@@tecmath🎉❤😊
Well now I want to write a formal proof about this...
That is interesting.
Let us know what you find.
Your comment got me thinking...
The problems here can be written as...
((10a + b)(10a + (10 - b))\)
Expanding this
(10a + b)(10a + 10 - b) = 100a^2 + 10a(10 - b) + 10ab + b(10 - b)
Now simplify
100a^2 + 100a - 10ab + 10ab + b(10 - b)
and combine like terms:
100a^2 + 100a + b(10 - b)
100a^2 + 100a + b(10 - b)
Which equals
100a(a + 1) + b(10 - b)
Proven.
Pretty cool right?
The problems here can be written as...
((10a + b)(10a + (10 - b))\)
Expanding this
(10a + b)(10a + 10 - b) = 100a^2 + 10a(10 - b) + 10ab + b(10 - b)
Now simplify
100a^2 + 100a - 10ab + 10ab + b(10 - b)
and combine like terms:
100a^2 + 100a + b(10 - b)
100a^2 + 100a + b(10 - b)
Which equals
100a(a + 1) + b(10 - b)
Proven.
Pretty cool right?
Thats easy. No didnt know
i tried this with 62*62 and i got 4204 but my calculator said 3844 does this theory not work in the 60's?
You forgot that the second digits need to add up to 10. So it works with 60s but it would have to be 62x68 for example
@@wutkeks4063Ah i see now.
Thanks for that
Better to use base 50 för numbers around that amount, unless a better method works. I am used to different bases though.
@@itsmemailingyou4234what’s base 50?