$$3\frac{1}{2}+2\frac{4}{5}$$
$\frac{63}{10}=6.3$
$$\frac{6+1}{2}+\frac{2\times 5+4}{5}$$
$$\frac{7}{2}+\frac{2\times 5+4}{5}$$
$$\frac{7}{2}+\frac{10+4}{5}$$
$$\frac{7}{2}+\frac{14}{5}$$
$$\frac{35}{10}+\frac{28}{10}$$
$$\frac{35+28}{10}$$
$$\frac{63}{10}$$
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$\frac{3 ^ {2} \cdot 7}{2 \cdot 5} = 6\frac{3}{10} = 6.3$
