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7.Efectueaza urmatoarele transformari: a) 7m=?dm=?cm; 5m=?dm=?mm; b) 1000mm=?cm=?dm; 800cm=?dm=?mm; c) 900dam=?hm=?km; 9km=?hm=?dam.

Răspuns :

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.