Bobealexandra17id Bobealexandra17id Matematică a fost răspuns 7. Ordonati descrescator urmatoarele numere rationale: a) 17/4,-18/5,19/6, 20/6; ...; 99/86, -100/87. b)-9/5,11/7,-13/9,15/11;....;-209/205,211/207