Maths Mental Calculation Trick

Tags:: Mental Math Fast Mathematics Tricks Speed V3nky Quick Calculation Improve

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v3nky
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Updated: 05-Jun-08
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International
Comments: 18
Views: 17,242
Added: 05-Sep-07

Learn to do square of any number in your head,
Leave Comments of what u think of this video
glad2teach link : http://www.metacafe.com/watch/791048/fast_math_trick/

Categories: How To, Science & Tech
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Comments on

Maths Mental Calculation Trick

18 Comments | Add Comment

good job
i like it u have done a great job carry it and do ur bast God blase u
By shah-g 1237502213 Reply Spam [+0] Moderate Up Moderate Down Remove ~~10989118~~
- 0
Best
Trick in Metacafe. The tricks should work on every number and his does.
By the way, the number closest to 13 is not 13, but 14 or 12 (whole numbers). He prolly meant closest number with 0 at the end.

One more trick:
First subtract 2 from the number.
Then find the square of the number
then add 4 to the result.
By Khukuri 1191534439 Reply Spam [+0] Moderate Up Moderate Down Remove ~~6710905~~
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cool
thanks for the trick
By YqYx 1191279729 Reply Spam [+0] Moderate Up Moderate Down Remove ~~5335282~~
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Attention
I did this before. I mean.. I guess I'm not the only one who found out about this. I even thought that this isn't worthy of my pride so I didn't actually tell it to anybody except my family of course. Great minds think alike.

PS
Chain letters dont work. Trust ME!
By mrdonald 1190879036 Reply Spam [+0] Moderate Up Moderate Down Remove ~~6642868~~
- 0
AWESOME!
We want more! We want more! 5 stars.
By taekkwon 1190137852 Reply Spam [+0] Moderate Up Moderate Down Remove ~~6566923~~
- 0
wow
you are a genius.
great stuff.
By kingstoncarl 1189271771 Reply Spam [+0] Moderate Up Moderate Down Remove ~~6449859~~
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But...
Doesn't this trick only work with numbers close to base 10? I tried with 37, and it didn't work. 37 is close to 40, so 3. 37 3 = 40. 40 * 40 = 16000. 3@ = 16009.
By RickyTheFish 1189140711 Reply Spam [+0] Moderate Up Moderate Down Remove ~~5535323~~
- 0
- u did wrongly
  it should be like this
  =(37-3)*(37 3) (3*3)
  =1360 (3*3)
  = 1369
  
  it works.
  By v3nky 1189141138 Reply Spam [+0] Moderate Up Moderate Down Remove ~~4184774~~
- 1
- Sorry.
  something happened with my original post, plus I miscalculated. But it's still wrong. 37 is close to 40 so 3. 37 3 = 40. 40 * 40 = 1600. 1600 3squared = 1609. 37 squared = 1369. Therefore this is wrong, except for numbers close to base 10.
  By RickyTheFish 1189140900 Reply Spam [+0] Moderate Up Moderate Down Remove ~~5535323~~
- 1
- Hmm.
  Apologies for the multiple postings, but apparently Metacafe does not like the plus sign, which is why it doesn't display in my posts. That is why they look strange.
  By RickyTheFish 1189140949 Reply Spam [+0] Moderate Up Moderate Down Remove ~~5535323~~
- 2
- did u follow my steps.
  it should be like this
  =(37-3)*(37 3) plus(3*3)
  =1360 plus (3*3)
  = 1369
  
  it works.
  By v3nky 1189141852 Reply Spam [+0] Moderate Up Moderate Down Remove ~~4184774~~
- 3
- plus.
  it should be like this
  =(37-3)*(37 plus 3) plus (3*3)
  =1360plus(3*3)
  = 1369
  
  it works.
  By v3nky 1189141906 Reply Spam [+0] Moderate Up Moderate Down Remove ~~4184774~~
- 4
- Sorry
  Yeah, I was doing it backwards. You reverse the sign for the number you subtracted or added to the original. So 37 is close to 40, which is plus 3. 37 minus 3 is 34. 40 times 34 equals 1360. Plus 3 squared is 1369. Sorry, you're right.
  By RickyTheFish 1189192372 Reply Spam [+0] Moderate Up Moderate Down Remove ~~5535323~~
- 5
Fuck....very good....
have more ?!?!?!?!
5 stars for you !!
And where did you from ??
By ubirtep 1189052868 Reply Spam [+0] Moderate Up Moderate Down Remove ~~3802776~~
- 0
- ty.
  i am from singapore..
  By v3nky 1212641086 Reply Spam [+0] Moderate Up Moderate Down Remove ~~4184774~~
- 1
- ty man
  ya i do have somemore tricks. i will share soon or later.. i am from singapore and thx for ur 5 stars :P
  By v3nky 1189053813 Reply Spam [+0] Moderate Up Moderate Down Remove ~~4184774~~
- 1
here's my teory
1x1=1.... that means 1 squared 1=1... and that's the same number everywhere. Proved 1 squered 342239058= 1... im a genius
By X_Thunder 1192127638 Reply Spam [-1] Moderate Up Moderate Down Remove ~~4157197~~
- 0
jddsd
PLEASE DONT READ THIS. YOU WILL GET KISSED ON THE NEAREST POSSIBLE FRIDAY BY THE LOVE OF YOUR LIFE. TOMORROW WILL BE THE BEST DAY OF YOUR LIFE. HOWEVER IF YOU DONT POST THIS COMMENT TO AT LEAST 3 VIDEOS YOU WILL DIE WITHIN 2 DAYS. NOW UV STARTED READIN DIS DUNT STOP THIS IS SO SCARY. SEND THIS OVER TO 5 VIDEOS IN 143 MINUTES WHEN UR DONE PRESS F6 AND UR CRUSHES NAME WILL APPEAR ON THE SCREEN IN BIG LETTERS. THIS IS SO SCARY CAUSE IT ACTUALLY WORKS THIS ACTUALLY WORKS!!!!!
By mrdonald 1190878673 Reply Spam [-1] Moderate Up Moderate Down Remove ~~6642868~~
- 0