The word Abacus is derived from the Greek word ‘abax’, meaning ‘calculating board’ or ‘calculating table’. The first Chinese Abacus was invented around 500 B.C. The abacus, as we know it today, was used in China around 1300 A.D. Often referred to as the first computer, the Abacus is an instrument used to perform arithmetic calculations and is still used today in places like China, Japan and Russia.
Mental Math is an ability to calculate and get a correct answer without using pencil & paper or any other electronic devices.
Mental Arithmetic (Mental Math) is a method of mental calculation; performed on a virtual image of abacus, formed in the mind. It is based on the principles of abacus calculation. In this case, the abacus is merely a tool, through regular practice of which children are able to visualize and internalize the image of abacus in their mind.
By using an abacus, a child can do all arithmetic calculations up to 10 digits and master the skill of doing it mentally, without relying on modern devices such as calculators.
