CPM Homework Help : CC1 Problem 4-72

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4-72.

Simplify the following expressions.

$1 \frac { 1 } { 2 } + 2 \frac { 1 } { 8 }$

Step 1 (a):
Covert both mixed numbers to fractions greater than one.
$\frac{3}{2}+\frac{17}{8}$
Step 2 (a):
Make both fractions have a denominator of 8.
$\frac{12}{8}+\frac{17}{8}$
Step 3 (a):
Simplify.
$\frac{12+17}{8}=\frac{29}{8}=3\frac{5}{8}$
Answer (a):
$3\frac{5}{8}$

$\frac{4}{5}-\frac{2}{3}+\frac{1}{6}$

Hint (b):
Convert each fraction to have a denominator of $30$ .
Answer (b):
$\frac{9}{30}=\frac{3}{10}$

$5\frac{3}{5}-1\frac{4}{5}$

Hint (c):
Change these to fractions greater than one and then subtract.

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