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abacus
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JPG 300 DPI
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Author:
dreamstime
License:
buy for Personal Use & Commercial
File Type:
JPG
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times
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abacus
adding
aged
computation
counting
education
fashioned
homeschool
manipulative
math
method
old
orientation
outdated
people
primitive
rustic
school
simple
subtracting
teaching
tool
vertical
white
wooden