$$|- \frac{ 1 }{ 2 } - \frac{ 2 }{ 3 } + \frac{ 5 }{ 4 }$$
$\frac{1}{12}\approx 0.083333333$
$$|-\frac{3}{6}-\frac{4}{6}+\frac{5}{4}|$$
$$|\frac{-3-4}{6}+\frac{5}{4}|$$
$$|-\frac{7}{6}+\frac{5}{4}|$$
$$|-\frac{14}{12}+\frac{15}{12}|$$
$$|\frac{-14+15}{12}|$$
$$|\frac{1}{12}|$$
$$\frac{1}{12}$$
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$\frac{1}{2 ^ {2} \cdot 3} = 0.08333333333333333$
