Yorum Yap
An abacus, also called as Counting Frame, is a calculating tool for performing arithmetical processes. It is as fast in some people`s hand as a calculator. It is often constructed as wooden frame with beads sliding on. This title contains a book & an Abacus.
Tükendi
Gelince Haber VerAn abacus, also called as Counting Frame, is a calculating tool for performing arithmetical processes. It is as fast in some people`s hand as a calculator. It is often constructed as wooden frame with beads sliding on. This title contains a book & an Abacus.
