a) $41\,cm = \frac{{41}}{{10}}dm = 4\frac{1}{{10}}dm$
$874\,cm = \frac{{874}}{{100}}\,m = 8\frac{{74}}{{100}}m$
$2500\,m = \frac{{2500}}{{1000}}km = 2\frac{{500}}{{1000}}km$
b) $2\,m\,3\,dm = 2\frac{3}{{10}}m$
$96\,m\,5\,cm = 96\frac{5}{{100}}m$
$7\,km\,7\,m = 7\frac{7}{{1000}}km$
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