The Abacus is the first calculator.
The balls of our abacus follow a color criterion to facilitate the explanation of the most complex arithmetic operations.
It also includes an elaborate User's Guide detailing the procedure to follow to carry out all the basic arithmetic operations on the Abacus - LADO.
It includes a marker that will help to indicate on the structure of the abacus the concepts that you want to reinforce (unds, tens, etc).
Measures 36 x 39.5 21.5 cm
