THE 11 TRICK!!
Multiplying any two digit number by 11:
Example: 36 x 11
1) Write the first and second digit of the two digit number on each end of the solution.
Example: 36 x 11 = 3 ___ 6
2) The middle digit of the solution will be the sum of the first and second digits of the two digit number.
Example: 3_(3+6)_6=396
This is true for any other two digit number being multiplied by 11
13 x 11 = 1_(1+3)_3
Ans. : 143
Example: 36 x 11 = 3 ___ 6
2) The middle digit of the solution will be the sum of the first and second digits of the two digit number.
Example: 3_(3+6)_6=396
13 x 11 = 1_(1+3)_3
Ans. : 143
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