A mathematics calculation on a blackboard at school

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Size: 5616px × 3744px
Photo credit: © Markus Mainka / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: billboard, blackboard, board, calculate, calculating, calculation, chalk, chalkboard, concept, concepts, count, counting, education, elementary, formula, intelligence, intelligent, isolated, learn, learning, lesson, lessons, math, mathematics, maths, number, school, student, white, wisdom