Friday 11 November 2011

**MULTIPLICATION OF 11 WITH ANY 2 DIGIT NUMBER

explain this rule by taking examples
35*11 = 3---(3+5)---5 = 385
Means insert the sum of first and second digits between the two digits of the number
27*11 = 2---(2+7)---7 = 297


 if sum of two digits of the number is greater than 10, then add 1 to first digit and subtract 10 to the inserted term
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EX:-
39*11 = 3+1---(3+9-10)---9 = 429

71*11=7+1----(7+1)---1=881

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