This workshop is organized around two main parts. The first part is devoted to reading and writing Roman numerals. Students learn and / or develop their skills by doing small exercises with the whole group.

The second part presents the abacus and itsuse. Additions and / or subtractions are presented to students. Using individual wooden abacus, they put each number and, whern necessary, simplify to obtain the calculation result. The correction is made in community. This activity is a fun way to teach students to love to calculate.