Răspuns:
Explicație pas cu pas:
a)
7m = 7*10 dm = 7*100 cm; 7m = 70 dm = 700 cm;
5m = 5*10 dm = 5*1000 mm; 5m = 50 dm = 5000 mm;
b)
1000 mm = 1000/10 cm =1000/100 dm; 1000 mm = 100 cm = 10 dm;
800 cm = 800/10 dm= 800*10 mm; 800 cm = 80 dm= 8000 mm;
c)
900 dam = 900/10 hm = 900/100 km; 900 dam = 90 hm = 9 km;
9 km = 9*10 hm = 9*100 dam; 9 km = 90 hm = 900 dam.