Question

Express the following as centimetre (cm) using decimals.

$3cm68mm$

Answer 1

Explanation:

We know that,

$$\begin{gathered} 1mm=\frac{1}{10}cm \\ 68mm=\frac{68}{10}=6.8cm \\ \therefore 3+6.8=9.8cm \end{gathered}$$

Hence,$3cm68mm=9.8cm$