Close-up of an old abacus on a grey background

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Size: 4501px × 2532px
Photo credit: © Micha Klootwijk / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: abacus, account, accountant, add, addition, background, black, calculate, calculation, classroom, close-, closeup, colored, count, early, education, factor, focus, green, grey, isolated, learning, mathematics, maths, numbers, numeric, nursery, office, red, representation, school, subtract, subtraction, sums, suplies, tools, white, wood