3
14
alphabet
appointment
black
board
by hand
calligraphy
centers
chalk
class
concept
council
crete
decimals
education
equivalence
figures
hand
infinite
letter
mathematics
motivation
number
pi
positive
rudiment
school
sentence
sign
source
speculation
successes
symbol
teaching
that
think
white
witty comment
written
定額
Pi number written with chalk on a blackboard, with its equivalence in numbersの素材 [FY310200110502]
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