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Here are some tips and tricks to be fast in your multiplication .You can use these trick and save time during your exams.But do not try these tricks in the exam without trying them prior to the exam.Hope you will enjoy them. 1.Multiplying by 11 This can be done in two ways.I mostly use the first one as I can quickly do addition. First Method- Imagine that you need to multiply 79 x 11.Here is the trick.What you have to do is multiply 79 by 10 and add another 79 to the answer. 79 x 11 = (79 x 10) + 79 =790 + 79 = 869 Second Method- Lets take the same example to this.Leave first and last digits alone and imagine a blank space between them. 79 x 11 =  7( ) 9   Next step is filling the blank with addition of first and last digits.As you can see it is 16 you have to add first digit of 16 to 7. 79 x 11 = 7 [ 7+9 ] 9 =( 7+1 )69 =769 If you have a larger number the steps are the same.Following example will help you to understand it.