0,12 km + 4,8 hm + 52 dam =....m

0,12 km = 120 m
4,8 hm = 480 m
52 dam = 520 m

120 + 480 + 520 = 1120 m

0,12 km = 0,12 × 1.000 = 120 m
4,8 hm = 4,8 × 100 = 480 m
52 dam = 52 × 10 = 520 m

= 120 m + 480 m + 520 m
= 1.120 m.