deepa mittal said – Fri, 02 Jan 2009 04:09:59 -0000 ( Link )
Rule 11
Here is a shortcut to multiply any two digit number by 11.
Say the number is 34
Add the two digits and place the sum (i.e 3+4=7) in between the two digits.
You get the answer 34*11=374.
2. If the sum of the two digits is greater than 9:
Say if the number is 46.
Add the two digits(4+6)=10.
Place the unit’s digit of the sum in between the two digits 406 and add the tens digit of the sum(i.e 1) to 4 and the answer is 506.
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