Răspuns:
a)
[tex] \frac{7}{8} + \frac{3}{6} = \frac{7}{8} + \frac{1}{2} = \frac{7 + 4}{8} = \frac{11}{8} [/tex]
b)
[tex] \frac{5}{3} - \frac{4}{9} = \frac{15 - 4}{9} = \frac{11}{9} [/tex]
c)
[tex] \frac{8}{9} \times \frac{3}{4} = \frac{2}{9} \times 3 = \frac{2}{3} [/tex]
[tex]( \frac{3}{4} )^{3} = [/tex]
=3³ supra 4³=27 supra 64
