$$(4^{2}+2^{2})\times(\frac{1}{2})^{3}$$
$\frac{5}{2}=2.5$
$$\left(16+2^{2}\right)\times \left(\frac{1}{2}\right)^{3}$$
$$\left(16+4\right)\times \left(\frac{1}{2}\right)^{3}$$
$$20\times \left(\frac{1}{2}\right)^{3}$$
$$20\times \frac{1}{8}$$
$$\frac{20}{8}$$
$$\frac{5}{2}$$
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$\frac{5}{2} = 2\frac{1}{2} = 2.5$
