The Chinese abacus known as the suànpán is typically 20 cm tall and it comes in various widths depending on the operator. It usually has more than seven rods. There are two beads on each rod in the upper deck and five beads each in the bottom for both decimal and hexadecimal computation. Modern abacuses have one bead on the top ...
An abacus, also called a counting frame, is a calculating tool used primarily by Asians for performing arithmetic processes. Nowadays, abaci are often constructed as a wooden frame...
