Gem Abacus Mental Arithmetic

The so-called abacus mental arithmetic refers to abacus-type mental arithmetic. Abacus is a calculation method that uses the abacus as a tool to perform operations such as addition, subtraction, multiplication, division, and square root. There are certain rules and formulas for the abacus movement skills. Once you are familiar with the abacus, you will start another kind of mental arithmetic training. You can restore the abacus through simulation and complete the abacus calculation in your brain, which is what we call abacus mental arithmetic.