Fast multiplication of 2-digit numbers

Method 2 : 

trick :

  this is comman trick for all 2 disit multiplication

let see the example-

          Example 2:

                     Lets number ( 12 *  13 )

by using this method we can save time which is benifit for exam..

Lets take the another example which has carry generated

 Example 3:

          number are   ( 21 * 26)

                                          

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