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-8supra5 + 2supra3 • (-9supra4)

Răspuns :

-8/5+[-18/12]
⇒-8/5+[-3/2]
⇒-8/5-3/2=-16/10-15/10=-31/10⇒fractie ireductibila[negativa];
[tex]- \frac{8}{5} + \frac{2}{3} *(- \frac{9}{4} )=- \frac{8}{5} +(- \frac{18}{12} )=- \frac{96}{60} + (-\frac{90}{60} )=- \frac{186}{60} =- \frac{31}{10} [/tex]