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Great Post.
You can read whole bunch of articles on the following website MathsEquation on mental math tricks.
Link here.Learn Cool Tricks to Solve Maths EasilyThereafter, while you perform any mathematical calculation,there exist certain patterns.If you can find the pattern and memorize each pattern.Of course not in a day. Soon you will find yourself in a position of performing mental math in front of audience.
Regards
very intresting subject.. thank you for invitation.Mental math involves three basic techniques: