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Multiplication of any number by 11

Multiplication of any number by 11 is a mathematical operation that involves multiplying any given number by the constant value of 11. This multiplication can be performed with whole numbers, decimals, or fractions. The rule for multiplying by 11 is to duplicate the digit and place it between the original digits. For example, if the number is 5, the multiplication would result in 55. Similarly, if the number is 10, the result would be 110. This method proves to be useful in quick mental calculations. . Mastering this technique can significantly improve computational speed and accuracy in various fields, including mathematics, engineering, and finance.

Format of multiplication by 11

LH digit II Add Digit II RH digit 

Ex. 1 : 45 × 11

                 4 II 4+5 II 5

                   495

Ex. 2 : 345 × 11

                3 II 3+4 II 4+5II 5

                   3 7 9 5

Ex 3 : 5678 × 11

            5II 5+6 II 6+7II 7+8 II 8 

           5//11 //13//15//8

                       6   2    4  5  8

 

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