
3 3 c m
40cm
actual image size: 32cm x 25cm
Description
A Japanese abacus with coloured plastic beads in a cardboard case. 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.
Image Details
Image Ref.
10325642
© Science Museum / Science & Society Picture Library