Question

Convert 9 decametre (dam) 8 centimetre (cm) into metre (m).

Answer 1

$$\begin{gathered} 9\mathrm{dam}8\mathrm{cm} \\ =9\times 10+8\times \frac{1}{100}\left[\mathrm{as},1\mathrm{dam}=10\mathrm{dm};1\mathrm{cm}=0.01\mathrm{m}\right] \\ =90+0.08 \\ =90.08\mathrm{m} \end{gathered}$$