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Calculati :
A) (+0,(5):(-0,0(5)
B) -80 supra 55: +33 supra 60


Răspuns :

0,(5):(-0,0(5))=5/9:(-5/90)=5/9×(-90/5)=-10

simplificam fractia-80/55 cu 5:
-80/55=-16/11
simplificam fractia 33/60cu3:
33/60=11/20
atunci exercitiul devine:-80/55:33/60=-16/11:11/20=-16/11×20/11=-320/121