Abacus Mental Calculations
The abacus is a mathematical calculation method. The abacus is used to add, subtract, multiply and divide. By using the abacus, the brain completes the computation, thereby raising the ability of the students to do mental arithmetic.
The abacus can be used at an astonishing speed. Often, as long as students can hear the numbers, or see the problem, the operator can immediately tell you the answer or write it down. This is the fundamental technique of computation using an abacus.