Reducing a fraction
or adding two fractions sometimes only requires that –1 be factored from one or
more denominators. For instance in 
the numerator and denominator are
only off by a factor of –1. To reduce this fraction, factor –1 from the
numerator or denominator:
In the sum 
the denominators are off by a
factor of –1. Factor –1 from one of the denominators and use the fact that 
to write both terms with the same
denominator.
In the next examples
and practice problems a ‘‘–1’’ is factored from the denominator and moved to
the numerator.
Examples
Practice
Solutions
Labels:
Mathematician
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