Soroban, Japanese abacus with coloured plastic beads in cardboard case.
Soroban, Japanese abacus with coloured plastic beads in cardboard case, 1975-1978. The soroban has 1 bead above the bar and 4 beads below. It is used for calculations in base 10. The soroban was developed from the Chinese abacus which had 2 beads above the bar and 5 below for working in base 16.
Parts
Cardboard case for Soroban
- Object Number:
- 1978-112 Pt2
- type:
- abacus (japanese)