$$(0.5\times5-0.005\times5)=?$$
$2.475$
$$2.5-0.005\times 5$$
$$2.5-0.025$$
$$2.475$$
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$\frac{11 \cdot 3 ^ {2}}{5 \cdot 2 ^ {3}} = 2\frac{19}{40} = 2.475$