Sunday, 25 November 2012

How to Quick Multiply two two digit numbers : (For Any two)


    For Exp.   65*48

Step 1. 65             ( Multiply unit Digit)
              * 
            48
            -----
                 0<-  (8*5=40)   
                    
Step 2. (8*6+5*4)=68+4(previous carry)=72    (Cross multiply)
          result=20

Step 3.   (6*4=24+7(carry))=31    (Multiply 10th digit)

     So result =3120.



#Second Method if you like for this question

          65(50-2)=3250-130=3120

     
   

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