Set of stationery on school chalkboard. International Pi Day
Schlüsselwörter
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day,
international,
pi,
school,
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stationery,
three,
14,
annual,
arithmetic,
blackboard,
card,
celebrate,
celebration,
class,
college,
constant,
date,
education,
event,
green,
greeting,
holiday,
homework,
cognition,
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lesson,
many,
march,
mathematic,
mathematical,
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month,
number,
pupil,
science,
student,
study,
studying,
supply,
symbol,
teaching,
text,
university,
earth
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