Easy Multiply

In Mathematics , multiplication is very easy when we consider multiplication by 11 or squaring a two-digit number ending with 5.
 


Multiplication By 11 :


          Lets consider an example 26 * 11


(i)Separate the two digits.                 2_6
(ii)Add the two digits together.            2 + 6 = 8
(iii)Put the sum between two digits.        2 8 6
               So 26 * 11 = 286


         If the sum of two digits is greater than 9 , you have to carry a 1 and add it to the first digit .
                Example 84 * 11                              


       (8+4 = 12)                           8 12* 4
        
          *The sum of two digits is greater than 9 , so carry the 1 and add it to the 8 . The final answer is 924 .




Squaring A Two-Digit Number Ending With 5 :


                Example 75 * 75     


(i)Multiply the first digit by one more than itself . (One more than 7 is 8)
                7 * 8 = 56
(ii)Put 25 after the answer .(The answer will always end in 25)
                    5625
               So 7 * 8 = 5625
ENJOY MATHEMATICS !!!