Răspuns:
Salut!
3.
a)
[tex] \frac{4}{5} \times 1 + \frac{1}{4} \times \frac{2}{3} = \frac{4}{5} \times \frac{5}{4} \times \frac{2}{3} =1 \times \frac{2}{3} = \frac{2}{3} [/tex]
b)
[tex]4 + \frac{1}{3} \times( 1 + \frac{2}{3} \times \frac{3}{5}) = \frac{13}{3} \times ( \frac{5}{3} \times \frac{3}{5} ) = \frac{13}{3} \times 1 = \frac{13}{3} [/tex]
c)
[tex]2 + \frac{3}{7} \times \frac{7}{17} \times 1 + \frac{1}{8} = \frac{17}{7} \times \frac{7}{17} \times \: \frac{9}{8} = 1 \times \frac{9}{8} = \frac{9}{8} [/tex]
Sper că te-am ajutat!
