\(3dam=30m\)
\(5cm= 0,05m\)
\(=>3dam 5 cm=30 + 0,05=30,05m\)
\(----------------------\)
\(5m 25dm=52,5m\)
`3dam = 3 xx 10 = 30m`
`5cm = 5 : 100 = 0,05m`
`=> 3dam5cm = 30 + 0,05 = 30,05m`
_________________________________
`25dm = 25 : 10 = 2,5m`
`=> 5m25dm = 5 +2,5 = 52,5m`