CPM Homework Help : CC2 Problem 6-8

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6-8.

Simplify the following expressions.

$-\frac{3}{4}-\frac{2}{5}$
Hint (a):
Change to addition.
More Help (a):
Find a common denominator.
Answer (a):
$-\frac{23}{20}$

$\frac{7}{8}-\frac{2}{3}$
Hint (b):
Find a common denominator.

$\frac{1}{3}-\frac{5}{6}$
Hint (c):
See part (b).

$1\frac{2}{3}+(-\frac{2}{5})$
Hint (d):
Recall that adding a negative number is essentially subtraction.

$\frac{4}{7}-(-\frac{3}{8})$
Hint (e):
Remember that when you subtract a negative number you are essentially adding it.
Answer (e):
$\frac{53}{56}$

$-4\frac{1}{2}+3\frac{1}{9}$
Hint (f):
Remember, the solution will have the same sign as the larger number.
Answer (f):
$-1\frac{7}{18}$

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