Imagine being able to make calculations in your mind, without using paper or pocket calculators.
Imagine being able to make fast calculations with your brain , competing with a calculator in the hands of your friends.
Imagine to know ways to make math calculations in different ways, that help you to enjoy more this world of magic numbers.
You can use this skill to have wonderful and funny moments.
This math is applicable to daily life, no matter if you are a child learning math, your a person buying things in a supermarket, a student attending a university or you are working person.