CPM Homework Help : MC1 Problem 10-15

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10-15.

Simplify each of the following expressions.

$1 - 3 ( \frac { 2 } { 3 } - \frac { 5 } { 6 } )$
Hint (a):
Try to find a common denominator and compute $\frac{2}{3}-\frac{5}{6}$ first.
Answer (a):
$1\frac{1}{2}$

$2 \frac { 1 } { 2 } ( - 3.2 )$
Hint (b):
Try changing both numbers to either fractions or decimals, then multiply.
Answer (b):
$-8$

$- 5 \div ( - \frac { 5 } { 4 } )$
Hint (c):
$-5$ divided by $-\frac{5}{4}$ is equal to -5 times what fraction?

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