$$\quad 3 \frac { 2 } { 5 } + \frac { 1 } { 5 } =$$
$\frac{18}{5}=3.6$
$$\frac{15+2}{5}+\frac{1}{5}$$
$$\frac{17}{5}+\frac{1}{5}$$
$$\frac{17+1}{5}$$
$$\frac{18}{5}$$
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$\frac{2 \cdot 3 ^ {2}}{5} = 3\frac{3}{5} = 3.6$
