Abacus Lesson -ADD and SUB- 3.1.9

This app offers a unique learning opportunity for individuals seeking to improve their skills in addition and subtraction using an abacus.

An abacus, known as "Soroban" in Japan, is a simple calculator that has been used in countries such as China, Japan, and Korea for centuries. Despite the prevalence of modern calculators on smartphones, the abacus remains a valuable tool.

One distinguishing feature between electric calculators and the abacus is the need to physically hold the abacus while performing calculations. Its simplicity allows for mental calculations, enabling users to effortlessly utilize the abacus in their minds.

Imagine the convenience of being able to perform calculations of up to three digits without the need for physical tools.

This app serves as a comprehensive learning resource, equipping users with essential calculation skills through the use of an abacus.