Multiplying by 11

We can use an easy trick for multiplying a two digit number by 11.

Such as,

we try to multiplying 23 by 11.

Generally its ,
              23
            *11 
              23
          +230
            253

by we can use a tricks to solve this multiplying 23 by 11.
23 is the original number here , we imagine a space between two digits ( in this example 2 and 3). 

like , 2___3

Now add the two number and put in the middle .
here (2+3=5),so we put additional number 5 in the middle .

like,  2 5 3 ..

we generally get it and , by using tricks it solve a few second.


*If the numbers in the middle add up to a 2 digit number, just the second number and add 1 to the first:

Suppose we multiplying 56*11

Generally,
                56
              *11
               56
           +560  
             616 

by using tricks  we apply ,

5___6

add two digit ,(5+6=11)
we put 1 in middle and another 1 add to 1st number .
like ,

  5 (11) 6
=616
Its same as general multiplying.