35 cm 98 mm = mm 158 cm 1 m = cm 70 dam 1 km = km 4 mm 1 cm = mm 3 600 m 4 cm = m 7 800 hm 7 km = hm 78 cm 13 dam = m 78 m 7 cm = dm 402 mm 48 cm = mm 45 km 78 m = hm Calcul sur le$ longueur$ (contrôle) 35 cm 98 mm = 448 mm 158 cm 1 m = 258 cm 70 dam 1 km = 1,7 km 4 mm 1 cm = 499 mm
