$$2\frac{1}{4}+3\frac{4}{5}.$$
$\frac{121}{20}=6.05$
$$\frac{8+1}{4}+\frac{3\times 5+4}{5}$$
$$\frac{9}{4}+\frac{3\times 5+4}{5}$$
$$\frac{9}{4}+\frac{15+4}{5}$$
$$\frac{9}{4}+\frac{19}{5}$$
$$\frac{45}{20}+\frac{76}{20}$$
$$\frac{45+76}{20}$$
$$\frac{121}{20}$$
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$\frac{11 ^ {2}}{2 ^ {2} \cdot 5} = 6\frac{1}{20} = 6.05$
