Rechenschieber, Abakus mit bunten Kugeln

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Size: 5278px × 4175px
Photo credit: © XTPgreyscape / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: abakus, blue, bunten, calculating, childhood, colorful, concept, education, kugeln, mathematics, mit, rechenschieber, symbol, white, wood, yellow