One of the most commonly used skills is mental arithmetic.

One of the most commonly used skills is mental arithmetic.

One of the most commonly used skills is mental arithmetic. And it is he who trains thinking perfectly. It would seem, why be able to quickly count in your head if you now always have a calculator at hand - in a smartphone, on a computer or tablet, even some watches already have such a function. There is a high probability that even in 100 years, when technology may have reached a higher level, people will still trust the most important things only to their brains. In our classes we also learn to count.