$$\frac { ( 0.8 ) ^ { 3 } + ( 0.5 ) ^ { 3 } } { ( 0.8 ) ^ { 2 } - ( 0.4 ) + ( 0.5 ) ^ { 2 } } = ?$$
$1.3$
$$\frac{0.512+0.5^{3}}{0.8^{2}-0.4+0.5^{2}}$$
$$\frac{0.512+0.125}{0.8^{2}-0.4+0.5^{2}}$$
$$\frac{0.637}{0.8^{2}-0.4+0.5^{2}}$$
$$\frac{0.637}{0.64-0.4+0.5^{2}}$$
$$\frac{0.637}{0.24+0.5^{2}}$$
$$\frac{0.637}{0.24+0.25}$$
$$\frac{0.637}{0.49}$$
$$\frac{637}{490}$$
$$\frac{13}{10}$$
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$\frac{13}{2 \cdot 5} = 1\frac{3}{10} = 1.3$
