In today's digital age, the human ability to think and numeracy paralyzed in mobile phone "We cannot continue to be like this. something has to be done!" => After downloading, you can print it and use it as a textbook. Learning abacus makes you unerstand the concept of numbers and improves your mental arithmetic skills and basic arithmetic ability in a short period of time. Basically, math is limited to the area of the left brain responsible for logic languages. However, abacus arithmetic...
