neat rows of colored beads on an abacus with a single blue bead to the side - abacus stock pictures, royalty-free photos & images
close-up of multi colored abacus calculator against gray background - abacus stock pictures, royalty-free photos & images
old abacus and businessmen on gray background - 3d rendering illustration - abacus stock pictures, royalty-free photos & images
objects: abacus chinese isolated on white background - abacus stock pictures, royalty-free photos & images
little girls and teacher learning at preschool. - abacus stock pictures, royalty-free photos & images
elder brother helping little boy to count on abacus - abacus stock pictures, royalty-free photos & images
toys: wooden abacus isolated on white background - abacus stock pictures, royalty-free photos & images
