CPM Homework Help : CC2 Problem 5-13

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5-13.

Simplify the following expressions.

$\frac { 2 } { 3 } + \frac { 4 } { 5 }$
Hint (a):
Change both fractions to equivalent fractions with a common denominator.
More Help (a):
$\frac{10}{15} + \frac{12}{15}$
Answer (a):
$\frac{22}{15}$

$( \frac { 4 } { 5 } ) ( \frac { 2 } { 3 } )$
Hint (b):
Multiply the numerators and denominators of both fractions.
Answer (b):
$\frac{8}{15}$

$\frac{4}{5}-(-\frac{2}{3})$
Hint (c):
Remember when you subtract a negative number, this has the same result as if you added it.
More Help (c):
$\frac{4}{5} + \frac{2}{3}$

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