CPM Homework Help : CCA Problem A-11

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A-11.

Simplify each expression.

$-\frac{1}{2}+\frac{3}{4}$
Hint (a):
Find the lowest common denominator.
More Help (a):
Pay attention to the signs.
Answer (a):
$-\frac{2}{4}+\frac{3}{4}=\frac{1}{4}$

$-\frac{1}{3}-\frac{1}{6}$
Answer (b):
$-\frac{1}{2}$

$-\frac{2}{3}·12$
Hint (c):
Simplify before multiplying.

$-4\div-\frac{1}{2}$
Hint (d):
Change division by a fraction into multiplication by the reciprocal.

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