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napkin math
English
Meaning
napkin math
meaning
What does
napkin math
mean?
napkin math
noun
—
(
North
America
)
The
act
of
performing
quick
mathematics
often
as
a
means
of
estimation
,
as
if
done
on
the
back
of
a
napkin
(
or
in
one
'
s
head
).
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