There are so many didactic strategies that allow teachers to teach mathematics, the abacus for example, is a vital tool to initiate students in the world of basic operations, addition and subtraction.
The augmented reality creates a new possibility to improve and learn new things every day, so we want all schools and universities use mobile devices properly and teach their students how to add and subtract with a 3D abacus.
Each part of the addition and subtraction process is designed to be carried out step by step and with rings of colors you can identify the units, tens, hundreds and thousands, so you can guarantee a better understanding and a real learning.