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shakeelmscw
Shayari Moderator
Joined: 22 Aug 2007
Posts: 5199
Location: United Arab Emirates |
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| The 11 Rule in math |
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The 11 Rule
You likely all know the 10 rule (to multiply by 10, just add a 0 behind the number) but do you know the 11 rule? It is as easy! You should be able to do this one in you head for any two digit number. Practice it on paper first!
To multiply any two digit number by 11:
For this example we will use 54.
Separate the two digits in you mind (5__4).
Notice the hole between them!
Add the 5 and the 4 together (5+4=9)
Put the resulting 9 in the hole 594. That's it! 11 x 54=594
The only thing tricky to remember is that if the result of the addition is greater than 9, you only put the "ones" digit in the hole and carry the "tens" digit from the addition. For example 11 x 57 ... 5__7 ... 5+7=12 ... put the 2 in the hole and add the 1 from the 12 to the 5 in to get 6 for a result of 627 ... 11 x 57 = 627
Practice it on paper first!
_________________
*(`'·.¸(`'·.¸*¤*¸.·'´)¸.·'´)*
«´¨`·.Shakeel Ahmed ..·´¨`»
*(¸.·'´(¸.·'´*¤*`'·.¸)`'·.¸)*
(((**A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes**)) |
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| Thu Feb 07, 2008 12:14 am |
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shakeelmscw
Shayari Moderator
Joined: 22 Aug 2007
Posts: 5199
Location: United Arab Emirates |
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If anyone need any help to understand, he can contact me at shakeelmscw@hotmail.com
_________________
*(`'·.¸(`'·.¸*¤*¸.·'´)¸.·'´)*
«´¨`·.Shakeel Ahmed ..·´¨`»
*(¸.·'´(¸.·'´*¤*`'·.¸)`'·.¸)*
(((**A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes**)) |
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| Sun Feb 10, 2008 12:19 am |
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