Question

Add the following lengths

cm mm

$80$ $02$

+$21$ $05$

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

Answer 1

When we add the length we get

cm mm

$80$ $02$

+$21$ $05$

$\_\_\_\_\_\_\_$

$10107$

________

Hence, the answer is $101$ cm $07$mm.