science, mathematics, calculating with finger numbers, image from "Suma" by Luca, 1674,

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Size: 1813px × 2268px
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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 17th, alphabet, applied, calculating, century, deaf, finger, fingers, hand, historic, historical, image, language, languages, math, mathematics, maths, numbers, numerical, people, pure, science, series, sign, signal, signs, suma