A wooden abacus, a counting frame, a calculating tool prior to the adoption of the Arabic numeral system. A frame of movable wooden beads

---

Size: 5568px × 3712px
Location: UK
Photo credit: © Leonora May / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: abaci, abacus, abacuses, abax, addition, algorithm, amc, angled, arabic, arithmetic, base, based, beads, board, calculate, calculating, calculation, calculations, calculator, cognitive, columns, counting, covered, cube, device, division, drawing, dust, effective, electronic, elementary, frame, horizontal, material, mathematical, maths, mental, movable, multiplication, number, numeral, numerical, pre, rectangular, roots, rows, runs, sandboard, school, schools, skill, square, strewn, subtraction, system, tablet, teaching, tool, tray, view, wooden