1per2 m kubik + 50 dm kubik=..........liter

[tex] \frac{1}{2} \: {m}^{3} + 50 \: {dm}^{3} = l \\ \\ ( \frac{1}{2} \times 1.000) + (50 \times 1) \\ \\ (1 \times 500 ) + 50 \\ \\ 500 + 50 \\ \\ 550 \: l[/tex]