Réponse :
a. 1 km = 1000 m = 10³ m
1 g = 0.001 mg = 10⁻³ m
1 km = 100000 cm = 10⁵cm
1 dag = 100 dg = 10² dg
b. 10⁴mm = 10000 mm = 10 m = 10¹ m
10⁵g = 100000 g = 50 kg = 5 X 10¹ kg
10²cm = 100 cm = 1 m = 10⁰ m
10¹ kg = 10 kg = 10000000 mg = 10⁷ mg
voilà j'espère que ça t'aura aidé
