Maths Trick ==> MULTIPLICATION OF 11 WITH ANY NUMBER OF 3 DIGITS.

MULTIPLICATION OF 11 WITH ANY NUMBER OF 3 DIGITS

 

 Let me explain this rule by taking examples
1. 352*11 = 3—(3+5)—(5+2)—2 = 3872
Means insert the sum of first and second digits, then sum of second and third digits between the two terminal digits of the number
2. 213*11 = 2—(2+1)—(1+3)—3 = 2343
EXAMPLE.
Here an extra case arises
Consider the following examples for that
1) 329*11 = 3— (3+2) +1— (2+9-10) —9 = 3619
Means, if sum of two digits of the number is greater than 10, then add 1 to previous digit and subtract 10 to the associated digit.
2) 758*11 = 7+1—(7+5-10)+1—(5+8-10)—8 = 8338

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