Question

Add the following lengths

$\mathrm{km}$ $m$ $\mathrm{cm}$

$20$ $600$ $90$

$40$ $750$ $25$

+$55$ $800$ $19$

$$\begin{gathered} \_\_\_\_\_\_\_\_\_\_\_\_\_\_ \\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_ \end{gathered}$$

Answer 1

Unit conversion and addition:

When we add the length we get

$\mathrm{km}$ $m$ $\mathrm{cm}$

$20$ $600$ $90$

$40$ $750$ $25$

+$55$ $800$ $19$

$$\begin{gathered} \_\_\_\_\_\_\_\_\_\_\_\_\_\_ \\ 1152150134 \end{gathered}$$

________$\_\_\_\_\_\_\_\_$

We know that

$100cm$ $=1m$

$134cm$ $=1m$ $34cm$

When we add the lengths the resultant is $115km2151m34cm$

We know that

$1000m$ $=1km$

$2151m$ $=2km$ $151m$

$\therefore$When we add the lengths we get $117km151m34cm$

Hence, the addition is$117km151m34cm$.