Express the following as metres using decimals.

$550 \text{cm}$.

Express the following as metres using decimals.

$4 \mathrm{m} 40 \mathrm{cm}$.

Express as kilograms using decimals.

$25 \mathrm{g}$

Express as kilograms using decimals.

$25 \mathrm{kg} 750 \mathrm{g}$

Express as kilograms using decimals.

$5 \mathrm{g}$