$$\frac{ 1 }{ 2 } +1 \frac{ 1 }{ 2 } \times \frac{ 2 }{ 3 } - \frac{ 1 }{ 4 }$$
$\frac{5}{4}=1.25$
$$\frac{1}{2}+\frac{2+1}{2}\times \frac{2}{3}-\frac{1}{4}$$
$$\frac{1}{2}+\frac{3}{2}\times \frac{2}{3}-\frac{1}{4}$$
$$\frac{1}{2}+1-\frac{1}{4}$$
$$\frac{1}{2}+\frac{2}{2}-\frac{1}{4}$$
$$\frac{1+2}{2}-\frac{1}{4}$$
$$\frac{3}{2}-\frac{1}{4}$$
$$\frac{6}{4}-\frac{1}{4}$$
$$\frac{6-1}{4}$$
$$\frac{5}{4}$$
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$\frac{5}{2 ^ {2}} = 1\frac{1}{4} = 1.25$
