$$4\frac{2}{5}+3\frac{1}{5}$$
$\frac{38}{5}=7.6$
$$\frac{20+2}{5}+\frac{3\times 5+1}{5}$$
$$\frac{22}{5}+\frac{3\times 5+1}{5}$$
$$\frac{22}{5}+\frac{15+1}{5}$$
$$\frac{22}{5}+\frac{16}{5}$$
$$\frac{22+16}{5}$$
$$\frac{38}{5}$$
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$\frac{2 \cdot 19}{5} = 7\frac{3}{5} = 7.6$
