Expanded notation is the term given in elementary mathematics education for the expansion of a positive integer in the form 
, i.e., as a sum of appropriate powers of 10 (the
base of the expansion) times its digits (in the case of
base-10, decimal digits). For example, the number with
decimal expansion 1234 would be written in expanded
form as
 |
Negative 
are also allowed in expanded notation of arbitrary (not necessarily integer)
numbers, e.g.,
 |
but such expansions usually not considered or deferred in elementary education contexts.
