Présentation
À propos de cette application
La description d’origine est affichée : aucune version française n’a été conservée.
Counting Beads is a calculating tool that was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere.
Today, abacus are often constructed as a bamboo frame with beads sliding on wires.
It is useful to students to learn mathematical operations like addition, subtraction and more.
#firefoxstudents
Today, abacus are often constructed as a bamboo frame with beads sliding on wires.
It is useful to students to learn mathematical operations like addition, subtraction and more.
#firefoxstudents