Question

4,5m+530cm+3250mm=?m

Answer 1

530cm=5.3m

3250mm=325cm=32.5dm=3.25m

4.5m+5.3m+3.25m=13.05m

Answer 2

$4,5~m+530~cm+3250~mm=\\=4,5~m+5,3~m+3,25~m=\\=\boxed{\bold{13,05~m}}$