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1 - 1 supra 2 + 1 supra 3 - 1 supra 4 + 1 supra 5
Mersi anticipat !


Răspuns :

=(60-30+20-15+12)/60=47/60=0,78(3)
1-1/2+1/3-1/4+1/5=(60-30+20-15+12)/60=47/60