What is the importance of #Yossi_Mas and its impact on children Everyone asks why start my child at #YusiMas Academy And what is the benefit that will accrue to it? Mental arithmetic means doing the arithmetic operations of addition, subtraction, division and multiplication, but by the brain and without the need to use a calculator It is considered one of the important skills for students in mathematics in particular, in addition to their acquiring skills beyond the limits of mathematics such as “the ability to perceive, understand, analyze and think speed, creativity, speed in academic achievement, and self-confidence.”