$$10 - 3 \frac { 1 } { 5 } - 5 \frac { 3 } { 10 }$$
$\frac{3}{2}=1.5$
$$10-\frac{15+1}{5}-\frac{5\times 10+3}{10}$$
$$10-\frac{16}{5}-\frac{5\times 10+3}{10}$$
$$\frac{50}{5}-\frac{16}{5}-\frac{5\times 10+3}{10}$$
$$\frac{50-16}{5}-\frac{5\times 10+3}{10}$$
$$\frac{34}{5}-\frac{5\times 10+3}{10}$$
$$\frac{34}{5}-\frac{50+3}{10}$$
$$\frac{34}{5}-\frac{53}{10}$$
$$\frac{68}{10}-\frac{53}{10}$$
$$\frac{68-53}{10}$$
$$\frac{15}{10}$$
$$\frac{3}{2}$$
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$\frac{3}{2} = 1\frac{1}{2} = 1.5$
